6556694975 has 12 divisors (see below), whose sum is σ = 8228259816. Its totient is φ = 5182157280.

The previous prime is 6556694953. The next prime is 6556694987. The reversal of 6556694975 is 5794966556.

It is not a de Polignac number, because 6556694975 - 2¹⁶ = 6556629439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1577852 + ... + 1582001.

It is an arithmetic number, because the mean of its divisors is an integer number (685688318).

Almost surely, 2^6556694975 is an apocalyptic number.

6556694975 is a deficient number, since it is larger than the sum of its proper divisors (1671564841).

6556694975 is a wasteful number, since it uses less digits than its factorization.

6556694975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159946 (or 3159941 counting only the distinct ones).

The product of its digits is 61236000, while the sum is 62.

The square root of 6556694975 is about 80973.4214109790. The cubic root of 6556694975 is about 1871.6658946949.

The spelling of 6556694975 in words is "six billion, five hundred fifty-six million, six hundred ninety-four thousand, nine hundred seventy-five".