664650012 has 48 divisors (see below), whose sum is σ = 1673087360. Its totient is φ = 204147648.

The previous prime is 664649987. The next prime is 664650023. The reversal of 664650012 is 210056466.

664650012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93123 + ... + 100005.

Almost surely, 2^664650012 is an apocalyptic number.

It is an amenable number.

664650012 is an abundant number, since it is smaller than the sum of its proper divisors (1008437348).

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

664650012 is a wasteful number, since it uses less digits than its factorization.

664650012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7522 (or 7520 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 664650012 is about 25780.8070471039. The cubic root of 664650012 is about 872.6987199899.

The spelling of 664650012 in words is "six hundred sixty-four million, six hundred fifty thousand, twelve".