664043612 has 6 divisors (see below), whose sum is σ = 1162076328. Its totient is φ = 332021804.

The previous prime is 664043609. The next prime is 664043623. The reversal of 664043612 is 216340466.

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, 83005448 + ... + 83005455.

It is an arithmetic number, because the mean of its divisors is an integer number (193679388).

Almost surely, 2^664043612 is an apocalyptic number.

It is an amenable number.

664043612 is a deficient number, since it is larger than the sum of its proper divisors (498032716).

664043612 is a wasteful number, since it uses less digits than its factorization.

664043612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166010907 (or 166010905 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 664043612 is about 25769.0436764735. The cubic root of 664043612 is about 872.4332341365.

The spelling of 664043612 in words is "six hundred sixty-four million, forty-three thousand, six hundred twelve".