165150665 has 16 divisors (see below), whose sum is σ = 214961040. Its totient is φ = 121313280.

The previous prime is 165150653. The next prime is 165150683. The reversal of 165150665 is 566051561.

It can be written as a sum of positive squares in 8 ways, for example, as 41229241 + 123921424 = 6421^2 + 11132^2 .

It is a de Polignac number, because none of the positive numbers 2^k-165150665 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20210 + ... + 27179.

It is an arithmetic number, because the mean of its divisors is an integer number (13435065).

Almost surely, 2^165150665 is an apocalyptic number.

It is an amenable number.

165150665 is a deficient number, since it is larger than the sum of its proper divisors (49810375).

165150665 is a wasteful number, since it uses less digits than its factorization.

165150665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47452.

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

The square root of 165150665 is about 12851.0958676683. The cubic root of 165150665 is about 548.6475475628.

The spelling of 165150665 in words is "one hundred sixty-five million, one hundred fifty thousand, six hundred sixty-five".