6816878766 has 24 divisors (see below), whose sum is σ = 14785059744. Its totient is φ = 2269961280.

The previous prime is 6816878693. The next prime is 6816878801. The reversal of 6816878766 is 6678786186.

It is a super-2 number, since 2×6816878766² = 92939672220683365512, which contains 22 as substring.

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, 176230 + ... + 211401.

It is an arithmetic number, because the mean of its divisors is an integer number (616044156).

Almost surely, 2^6816878766 is an apocalyptic number.

6816878766 is an abundant number, since it is smaller than the sum of its proper divisors (7968180978).

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

6816878766 is a wasteful number, since it uses less digits than its factorization.

6816878766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388616 (or 388613 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The square root of 6816878766 is about 82564.3916346508. The cubic root of 6816878766 is about 1896.1027006672.

The spelling of 6816878766 in words is "six billion, eight hundred sixteen million, eight hundred seventy-eight thousand, seven hundred sixty-six".