This number is a composite.

+ 165 is a multiple of (16 - 5), which is its largest prime factor. [Trotter]

+ 165 is the mean of the nth larger prime and nth smaller prime, for n = 1, 2, 3, 4, 5, 6. [Post]

+ The smallest sphenic number whose the reversal is a different sphenic number. Shall we call this a cinehps number? [Loungrides]

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

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