6881312812566 has 16 divisors (see below), whose sum is σ = 13765586022000. Its totient is φ = 2293277538048.

The previous prime is 6881312812537. The next prime is 6881312812573. The reversal of 6881312812566 is 6652182131886.

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 7 ways as a sum of consecutive naturals, for example, 123319651 + ... + 123375438.

It is an arithmetic number, because the mean of its divisors is an integer number (860349126375).

Almost surely, 2^{6881312812566} is an apocalyptic number.

6881312812566 is an abundant number, since it is smaller than the sum of its proper divisors (6884273209434).

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

6881312812566 is a wasteful number, since it uses less digits than its factorization.

6881312812566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246699743.

The product of its digits is 6635520, while the sum is 57.

The spelling of 6881312812566 in words is "six trillion, eight hundred eighty-one billion, three hundred twelve million, eight hundred twelve thousand, five hundred sixty-six".