This number is a composite.

+ 175 = 11 + 72 + 53. Note unity and the first four prime numbers.

+ The smallest number n greater than 1 such that n^6 + 6 is prime. [Rodrigo]

+ Smaller in the first pair of Honaker brothers {175, 176}.

+ The smallest composite number that forms two primes when its digits are sorted from low to high (157) and from high to low (751). The next two such composite numbers are 176 and 194. [Gaydos]

(There is one curio for this number that has not yet been approved by an editor.)

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