8665728564 has 48 divisors (see below), whose sum is σ = 20658330560. Its totient is φ = 2826455040.

The previous prime is 8665728517. The next prime is 8665728613. The reversal of 8665728564 is 4658275668.

It is a congruent number.

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, 110607 + ... + 171945.

Almost surely, 2^8665728564 is an apocalyptic number.

It is an amenable number.

8665728564 is an abundant number, since it is smaller than the sum of its proper divisors (11992601996).

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

8665728564 is a wasteful number, since it uses less digits than its factorization.

8665728564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61600 (or 61598 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 57.

The square root of 8665728564 is about 93089.8950692286. The cubic root of 8665728564 is about 2054.0059335765.

The spelling of 8665728564 in words is "eight billion, six hundred sixty-five million, seven hundred twenty-eight thousand, five hundred sixty-four".