6878756566 has 32 divisors (see below), whose sum is σ = 11462105088. Its totient is φ = 3069887040.

The previous prime is 6878756557. The next prime is 6878756567. The reversal of 6878756566 is 6656578786.

It is a super-2 number, since 2×6878756566² = 94634583788576224712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6878756498 and 6878756507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6878756567) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 348535 + ... + 367741.

It is an arithmetic number, because the mean of its divisors is an integer number (358190784).

Almost surely, 2^6878756566 is an apocalyptic number.

6878756566 is a deficient number, since it is larger than the sum of its proper divisors (4583348522).

6878756566 is a wasteful number, since it uses less digits than its factorization.

6878756566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19516.

The product of its digits is 101606400, while the sum is 64.

The square root of 6878756566 is about 82938.2696105965. The cubic root of 6878756566 is about 1901.8224956096.

The spelling of 6878756566 in words is "six billion, eight hundred seventy-eight million, seven hundred fifty-six thousand, five hundred sixty-six".