6477766856 has 32 divisors (see below), whose sum is σ = 13267346400. Its totient is φ = 2940579840.

The previous prime is 6477766817. The next prime is 6477766891. The reversal of 6477766856 is 6586677746.

It is a super-2 number, since 2×6477766856² = 83922926881384249472, 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, 19811 + ... + 115533.

It is an arithmetic number, because the mean of its divisors is an integer number (414604575).

Almost surely, 2^6477766856 is an apocalyptic number.

It is an amenable number.

6477766856 is an abundant number, since it is smaller than the sum of its proper divisors (6789579544).

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

6477766856 is a wasteful number, since it uses less digits than its factorization.

6477766856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96509 (or 96505 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 62.

The square root of 6477766856 is about 80484.5752675629. The cubic root of 6477766856 is about 1864.1253154588.

The spelling of 6477766856 in words is "six billion, four hundred seventy-seven million, seven hundred sixty-six thousand, eight hundred fifty-six".