165

165 is: an odd number, a composite number, and a deficient number. a sphenic number. a tetrahedral number. the number of prime knots with 10 crossings. the sum of the sums of the divisors of the first 14 positive integers. a self number in base 10. a palindromic number in binary (101001012) and bases 14 (BB14), 32 (5532) and 54 (3354). a unique period in base 2.