664372476 has 24 divisors (see below), whose sum is σ = 1722447440. Its totient is φ = 221457456.

The previous prime is 664372463. The next prime is 664372483. The reversal of 664372476 is 674273466.

It is a congruent number.

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, 3075691 + ... + 3075906.

Almost surely, 2^664372476 is an apocalyptic number.

It is an amenable number.

664372476 is an abundant number, since it is smaller than the sum of its proper divisors (1058074964).

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

664372476 is a wasteful number, since it uses less digits than its factorization.

664372476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6151610 (or 6151602 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 45.

The square root of 664372476 is about 25775.4238762430. The cubic root of 664372476 is about 872.5772329779.

The spelling of 664372476 in words is "six hundred sixty-four million, three hundred seventy-two thousand, four hundred seventy-six".