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The smallest twodigit HyperCullen 2nd species prime, i.e., a prime of the form n * 2^{n} + (n  1). [Russo] The largest prime which is not the sum of distinct squares. [Crespi de Valldaura] (6*7) = 6+7. [Firoozbakht] 67 = sqrt(9!/(9 * 9) + 9). [Poo Sung] 5^{67} starts with the digits 67. [Hartley] The hull number of the U.S. Navy's aircraft carrier USS John F. Kennedy (CV67). The smallest prime which contains all ten digits when raised to the tenth power. [Patterson] The "Summer of Love" was a phrase given to the summer of '67, describing (personifying) the feeling of being in San Francisco that summer when the hippie movement came to full fruition. The inventor of natural logarithms (John Napier) died at the age of 67. *67 ("star 67") is a free phone feature that blocks sending name and phone number on an outgoing individual call. Use *67 + number being dialed (must be done for each call). [Greer] The smallest prime p that divides the number of composites less than the (p + 1)th prime. [Honaker] Using the alphabet code, the value of 67 in its Roman numeralbased representation (LXVII) is the reversal of 67. [Necula] In the opening scenes of the movie Hard Target, set in New Orleans, a horse and carriage numbered 67 rumbles by. [Haga] The Escher compound that appears in the "Waterfall" lithograph by M. C. Escher divides the three component cubes into 67 individual cells. [Post] 6^{7} is the sum of a twin prime pair. [Rivera] Longitude 67 degrees West passes through the easternmost city in the United States (Eastport, Maine). A prime place to see the sunrise. [Punches] 2^6 + 2^1 + 2^0 = 26 + 21 + 20 = 67. [Morse] Charles Lindbergh was the 67th man to make a nonstop flight over the Atlantic Ocean. (The first were Alcock and Brown, the 31 men on the English dirigible R34, and the 33 men on ZeppelinAirship LZ126.) [Caldwell] A new born infant is considered fullterm when the gestation age in weeks lies between p_{k+6} and p_{k+7}, where p_{k} = 6+7 and p_{n} is the nth prime (i.e., between 37 and 41 weeks). [Beedassy] The sum of all idoneal primes. (A positive integer m is idoneal if and only if it cannot be written as ab + bc + ac for integer a, b, and c with 0 < a < b < c.) [Loungrides] Fresh milk has a pH of 6.7 and is therefore slightly acidic. [O'Mahony] The largest known prime number p for which the decimal expansion of 2^{p} does not contain any pair of consecutive equal digits. It's also the case for the decimal expansion of 3^{p}. [Capelle] The largest known prime number p for which the decimal expansion of 2^{p} does not contain any zero. [Capelle] Smallest multidigit prime whose square (i.e., 4489) and cube (i.e., 300763) consist of different digits. [Gupta] Smallest odd prime number of bicentered 3valent (or boron, or binary) trees with n nodes. Here with n = 12. [Post] Any digit n, 1 through 9, times 67 yields a 3digit number (for the purpose of this discussion make 1*67 = 067), then the concatenation of the first and last digits of the product equals n times 7. E.g., 8*67 = 536 and 8*7 = 56. [Green] "And that which the rest of the people gave was twenty thousand drams of gold, and two thousand pound of silver, and threescore and seven priests' garments." (Nehemiah 7:72, KJV) To "be at sixes and sevens" is an informal expression meaning to be thoroughly confused. [Jose] Foucault's most famous pendulum contained a 67meter long wire. One smoot is equal to 67 inches. The first prime midway between a square and a cube, (3^2 and 5^3). [Loungrides] Season 8, Episode 184 of "Dr. Oz" featured a woman who claims to have 67 different personalities. [Stath] The smallest polite prime that is a concatenation of two successive polite numbers, i.e., (6=1+2+3, 7=3+4). [Loungrides]
(There are 15 curios for this number that have not yet been approved by an editor.)
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