165559065 has 64 divisors (see below), whose sum is σ = 329072640. Its totient is φ = 69361920.

The previous prime is 165559019. The next prime is 165559081. The reversal of 165559065 is 560955561.

It is not a de Polignac number, because 165559065 - 2⁹ = 165558553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60507 + ... + 63183.

It is an arithmetic number, because the mean of its divisors is an integer number (5141760).

Almost surely, 2^165559065 is an apocalyptic number.

165559065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165559065 is a deficient number, since it is larger than the sum of its proper divisors (163513575).

165559065 is a wasteful number, since it uses less digits than its factorization.

165559065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742.

The product of its (nonzero) digits is 202500, while the sum is 42.

The square root of 165559065 is about 12866.9757519007. The cubic root of 165559065 is about 549.0994242644.

The spelling of 165559065 in words is "one hundred sixty-five million, five hundred fifty-nine thousand, sixty-five".