165664528 has 20 divisors (see below), whose sum is σ = 321176988. Its totient is φ = 82780160.

The previous prime is 165664493. The next prime is 165664531. The reversal of 165664528 is 825466561.

165664528 is digitally balanced in base 3, 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 119858704 + 45805824 = 10948^2 + 6768^2 .

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, 42168 + ... + 45928.

Almost surely, 2^165664528 is an apocalyptic number.

It is an amenable number.

165664528 is a deficient number, since it is larger than the sum of its proper divisors (155512460).

165664528 is a wasteful number, since it uses less digits than its factorization.

165664528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6522 (or 6516 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The square root of 165664528 is about 12871.0733041188. The cubic root of 165664528 is about 549.2159937005.

The spelling of 165664528 in words is "one hundred sixty-five million, six hundred sixty-four thousand, five hundred twenty-eight".