6557386975 has 12 divisors (see below), whose sum is σ = 8350922104. Its totient is φ = 5104127520.

The previous prime is 6557386943. The next prime is 6557386993. The reversal of 6557386975 is 5796837556.

It is not a de Polignac number, because 6557386975 - 2⁵ = 6557386943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3543609 + ... + 3545458.

Almost surely, 2^6557386975 is an apocalyptic number.

6557386975 is a deficient number, since it is larger than the sum of its proper divisors (1793535129).

6557386975 is a wasteful number, since it uses less digits than its factorization.

6557386975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7089114 (or 7089109 counting only the distinct ones).

The product of its digits is 47628000, while the sum is 61.

The square root of 6557386975 is about 80977.6943052838. The cubic root of 6557386975 is about 1871.7317381949.

The spelling of 6557386975 in words is "six billion, five hundred fifty-seven million, three hundred eighty-six thousand, nine hundred seventy-five".