8664518728 has 16 divisors (see below), whose sum is σ = 16248587760. Its totient is φ = 4331562000.

The previous prime is 8664518711. The next prime is 8664518749. The reversal of 8664518728 is 8278154668.

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, 32338 + ... + 135553.

It is an arithmetic number, because the mean of its divisors is an integer number (1015536735).

Almost surely, 2^8664518728 is an apocalyptic number.

It is an amenable number.

8664518728 is a deficient number, since it is larger than the sum of its proper divisors (7584069032).

8664518728 is a wasteful number, since it uses less digits than its factorization.

8664518728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174348 (or 174344 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 55.

The square root of 8664518728 is about 93083.3966290444. The cubic root of 8664518728 is about 2053.9103414611.

The spelling of 8664518728 in words is "eight billion, six hundred sixty-four million, five hundred eighteen thousand, seven hundred twenty-eight".