8664399400 has 24 divisors (see below), whose sum is σ = 20144729070. Its totient is φ = 3465759680.

The previous prime is 8664399389. The next prime is 8664399439. The reversal of 8664399400 is 49934668.

It can be written as a sum of positive squares in 3 ways, for example, as 4870085796 + 3794313604 = 69786^2 + 61598^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21660799 + ... + 21661198.

Almost surely, 2^8664399400 is an apocalyptic number.

It is an amenable number.

8664399400 is an abundant number, since it is smaller than the sum of its proper divisors (11480329670).

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

8664399400 is a wasteful number, since it uses less digits than its factorization.

8664399400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43322013 (or 43322004 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 8664399400 is about 93082.7556532358. The cubic root of 8664399400 is about 2053.9009125804.

The spelling of 8664399400 in words is "eight billion, six hundred sixty-four million, three hundred ninety-nine thousand, four hundred".