165626564 has 12 divisors (see below), whose sum is σ = 290419500. Its totient is φ = 82649568.

The previous prime is 165626507. The next prime is 165626579. The reversal of 165626564 is 465626561.

165626564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 53436100 + 112190464 = 7310^2 + 10592^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 38639 + ... + 42710.

It is an arithmetic number, because the mean of its divisors is an integer number (24201625).

Almost surely, 2^165626564 is an apocalyptic number.

It is an amenable number.

165626564 is a deficient number, since it is larger than the sum of its proper divisors (124792936).

165626564 is a wasteful number, since it uses less digits than its factorization.

165626564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81862 (or 81860 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The square root of 165626564 is about 12869.5984397339. The cubic root of 165626564 is about 549.1740373663.

The spelling of 165626564 in words is "one hundred sixty-five million, six hundred twenty-six thousand, five hundred sixty-four".