664912611 has 16 divisors (see below), whose sum is σ = 1074606720. Its totient is φ = 402977160.

The previous prime is 664912603. The next prime is 664912637. The reversal of 664912611 is 116219466.

664912611 is a `hidden beast` number, since 6 + 649 + 1 + 2 + 6 + 1 + 1 = 666.

664912611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664912611 - 2³ = 664912603 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (664912601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1119085 + ... + 1119678.

It is an arithmetic number, because the mean of its divisors is an integer number (67162920).

Almost surely, 2^664912611 is an apocalyptic number.

664912611 is a deficient number, since it is larger than the sum of its proper divisors (409694109).

664912611 is a wasteful number, since it uses less digits than its factorization.

664912611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238783 (or 2238777 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 664912611 is about 25785.8994607518. The cubic root of 664912611 is about 872.8136374314.

The spelling of 664912611 in words is "six hundred sixty-four million, nine hundred twelve thousand, six hundred eleven".