66904464 has 40 divisors (see below), whose sum is σ = 188550432. Its totient is φ = 20273920.

The previous prime is 66904459. The next prime is 66904471. The reversal of 66904464 is 46440966.

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, 62829 + ... + 63884.

Almost surely, 2^66904464 is an apocalyptic number.

It is an amenable number.

66904464 is an abundant number, since it is smaller than the sum of its proper divisors (121645968).

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

66904464 is a wasteful number, since it uses less digits than its factorization.

66904464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126735 (or 126729 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 66904464 is about 8179.5149000414. The cubic root of 66904464 is about 405.9616714203.

The spelling of 66904464 in words is "sixty-six million, nine hundred four thousand, four hundred sixty-four".