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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]
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