165565160 has 16 divisors (see below), whose sum is σ = 372521700. Its totient is φ = 66226048.

The previous prime is 165565139. The next prime is 165565171. The reversal of 165565160 is 61565561.

It can be written as a sum of positive squares in 2 ways, for example, as 162460516 + 3104644 = 12746^2 + 1762^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 165565160.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2069525 + ... + 2069604.

Almost surely, 2^165565160 is an apocalyptic number.

165565160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165565160 is an abundant number, since it is smaller than the sum of its proper divisors (206956540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165565160 is a wasteful number, since it uses less digits than its factorization.

165565160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139140 (or 4139136 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 165565160 is about 12867.2125963629. The cubic root of 165565160 is about 549.1061624838.

The spelling of 165565160 in words is "one hundred sixty-five million, five hundred sixty-five thousand, one hundred sixty".