165331566 has 12 divisors (see below), whose sum is σ = 358218432. Its totient is φ = 55110516.

The previous prime is 165331547. The next prime is 165331589. The reversal of 165331566 is 665133561.

165331566 is a `hidden beast` number, since 1 + 65 + 3 + 31 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 165331566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4592526 + ... + 4592561.

It is an arithmetic number, because the mean of its divisors is an integer number (29851536).

Almost surely, 2^165331566 is an apocalyptic number.

165331566 is an abundant number, since it is smaller than the sum of its proper divisors (192886866).

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

165331566 is a wasteful number, since it uses less digits than its factorization.

165331566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9185095 (or 9185092 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 165331566 is about 12858.1322905000. The cubic root of 165331566 is about 548.8477983929.

The spelling of 165331566 in words is "one hundred sixty-five million, three hundred thirty-one thousand, five hundred sixty-six".