673239664 has 10 divisors (see below), whose sum is σ = 1304401880. Its totient is φ = 336619824.

The previous prime is 673239631. The next prime is 673239683. The reversal of 673239664 is 466932376.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21038724 + ... + 21038755.

It is an arithmetic number, because the mean of its divisors is an integer number (130440188).

Almost surely, 2^673239664 is an apocalyptic number.

It is an amenable number.

673239664 is a deficient number, since it is larger than the sum of its proper divisors (631162216).

673239664 is a wasteful number, since it uses less digits than its factorization.

673239664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42077487 (or 42077481 counting only the distinct ones).

The product of its digits is 979776, while the sum is 46.

The square root of 673239664 is about 25946.8623151240. The cubic root of 673239664 is about 876.4421015083.

The spelling of 673239664 in words is "six hundred seventy-three million, two hundred thirty-nine thousand, six hundred sixty-four".