664983136 has 24 divisors (see below), whose sum is σ = 1311300144. Its totient is φ = 331954560.

The previous prime is 664983133. The next prime is 664983157. The reversal of 664983136 is 631389466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664983133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3726 + ... + 36658.

It is an arithmetic number, because the mean of its divisors is an integer number (54637506).

Almost surely, 2^664983136 is an apocalyptic number.

It is an amenable number.

664983136 is a deficient number, since it is larger than the sum of its proper divisors (646317008).

664983136 is a wasteful number, since it uses less digits than its factorization.

664983136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33574 (or 33566 counting only the distinct ones).

The product of its digits is 559872, while the sum is 46.

The square root of 664983136 is about 25787.2669354470. The cubic root of 664983136 is about 872.8444951234.

The spelling of 664983136 in words is "six hundred sixty-four million, nine hundred eighty-three thousand, one hundred thirty-six".