8664640620 has 48 divisors (see below), whose sum is σ = 24347379168. Its totient is φ = 2302343680.

The previous prime is 8664640609. The next prime is 8664640637. The reversal of 8664640620 is 260464668.

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, 240099 + ... + 273818.

It is an arithmetic number, because the mean of its divisors is an integer number (507237066).

Almost surely, 2^8664640620 is an apocalyptic number.

It is an amenable number.

8664640620 is an abundant number, since it is smaller than the sum of its proper divisors (15682738548).

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

8664640620 is a wasteful number, since it uses less digits than its factorization.

8664640620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514210 (or 514208 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The square root of 8664640620 is about 93084.0513729393. The cubic root of 8664640620 is about 2053.9199728506.

The spelling of 8664640620 in words is "eight billion, six hundred sixty-four million, six hundred forty thousand, six hundred twenty".