6646624264 has 32 divisors (see below), whose sum is σ = 14280995520. Its totient is φ = 2840907456.

The previous prime is 6646624253. The next prime is 6646624321. The reversal of 6646624264 is 4624266466.

It is a happy number.

It is a super-2 number, since 2×6646624264² = 88355228213587083392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138214 + ... + 179989.

It is an arithmetic number, because the mean of its divisors is an integer number (446281110).

Almost surely, 2^6646624264 is an apocalyptic number.

It is an amenable number.

6646624264 is an abundant number, since it is smaller than the sum of its proper divisors (7634371256).

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

6646624264 is a wasteful number, since it uses less digits than its factorization.

6646624264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318589 (or 318585 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 46.

The square root of 6646624264 is about 81526.8315586961. The cubic root of 6646624264 is about 1880.1841022365.

The spelling of 6646624264 in words is "six billion, six hundred forty-six million, six hundred twenty-four thousand, two hundred sixty-four".