664572832 has 48 divisors (see below), whose sum is σ = 1631230272. Its totient is φ = 258923520.

The previous prime is 664572817. The next prime is 664572841. The reversal of 664572832 is 238275466.

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, 132393 + ... + 137320.

It is an arithmetic number, because the mean of its divisors is an integer number (33983964).

Almost surely, 2^664572832 is an apocalyptic number.

It is an amenable number.

664572832 is an abundant number, since it is smaller than the sum of its proper divisors (966657440).

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

664572832 is a wasteful number, since it uses less digits than its factorization.

664572832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269741 (or 269733 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 664572832 is about 25779.3101536872. The cubic root of 664572832 is about 872.6649390560.

The spelling of 664572832 in words is "six hundred sixty-four million, five hundred seventy-two thousand, eight hundred thirty-two".