6656572172 has 48 divisors (see below), whose sum is σ = 12278525952. Its totient is φ = 3153608640.

The previous prime is 6656572151. The next prime is 6656572183. The reversal of 6656572172 is 2712756566.

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, 2436047 + ... + 2438777.

It is an arithmetic number, because the mean of its divisors is an integer number (255802624).

Almost surely, 2^6656572172 is an apocalyptic number.

It is an amenable number.

6656572172 is a deficient number, since it is larger than the sum of its proper divisors (5621953780).

6656572172 is a wasteful number, since it uses less digits than its factorization.

6656572172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3198 (or 3196 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 47.

The square root of 6656572172 is about 81587.8187721672. The cubic root of 6656572172 is about 1881.1216495885.

The spelling of 6656572172 in words is "six billion, six hundred fifty-six million, five hundred seventy-two thousand, one hundred seventy-two".