664088672 has 24 divisors (see below), whose sum is σ = 1407996576. Its totient is φ = 306502272.

The previous prime is 664088669. The next prime is 664088743. The reversal of 664088672 is 276880466.

It is a congruent number.

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, 797768 + ... + 798599.

It is an arithmetic number, because the mean of its divisors is an integer number (58666524).

Almost surely, 2^664088672 is an apocalyptic number.

It is an amenable number.

664088672 is an abundant number, since it is smaller than the sum of its proper divisors (743907904).

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

664088672 is a wasteful number, since it uses less digits than its factorization.

664088672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596390 (or 1596382 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 664088672 is about 25769.9179664973. The cubic root of 664088672 is about 872.4529672542.

The spelling of 664088672 in words is "six hundred sixty-four million, eighty-eight thousand, six hundred seventy-two".