664752552 has 32 divisors (see below), whose sum is σ = 1685292480. Its totient is φ = 218462720.

The previous prime is 664752533. The next prime is 664752577. The reversal of 664752552 is 255257466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193353 + ... + 196760.

It is an arithmetic number, because the mean of its divisors is an integer number (52665390).

Almost surely, 2^664752552 is an apocalyptic number.

It is an amenable number.

664752552 is an abundant number, since it is smaller than the sum of its proper divisors (1020539928).

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

664752552 is a wasteful number, since it uses less digits than its factorization.

664752552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390193 (or 390189 counting only the distinct ones).

The product of its digits is 504000, while the sum is 42.

The square root of 664752552 is about 25782.7956591212. The cubic root of 664752552 is about 872.7435967038.

The spelling of 664752552 in words is "six hundred sixty-four million, seven hundred fifty-two thousand, five hundred fifty-two".