6645576172 has 12 divisors (see below), whose sum is σ = 11633275080. Its totient is φ = 3321783296.

The previous prime is 6645576167. The next prime is 6645576181. The reversal of 6645576172 is 2716755466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236218 + ... + 262849.

It is an arithmetic number, because the mean of its divisors is an integer number (969439590).

Almost surely, 2^6645576172 is an apocalyptic number.

It is an amenable number.

6645576172 is a deficient number, since it is larger than the sum of its proper divisors (4987698908).

6645576172 is a wasteful number, since it uses less digits than its factorization.

6645576172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502400 (or 502398 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 49.

The square root of 6645576172 is about 81520.4034092079. The cubic root of 6645576172 is about 1880.0852696348.

The spelling of 6645576172 in words is "six billion, six hundred forty-five million, five hundred seventy-six thousand, one hundred seventy-two".