664033812 has 48 divisors (see below), whose sum is σ = 1756426560. Its totient is φ = 193563648.

The previous prime is 664033757. The next prime is 664033823. The reversal of 664033812 is 218330466.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109053 + ... + 114980.

It is an arithmetic number, because the mean of its divisors is an integer number (36592220).

Almost surely, 2^664033812 is an apocalyptic number.

It is an amenable number.

664033812 is an abundant number, since it is smaller than the sum of its proper divisors (1092392748).

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

664033812 is a wasteful number, since it uses less digits than its factorization.

664033812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224072 (or 224070 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 664033812 is about 25768.8535251377. The cubic root of 664033812 is about 872.4289423060.

The spelling of 664033812 in words is "six hundred sixty-four million, thirty-three thousand, eight hundred twelve".