6866386856 has 48 divisors (see below), whose sum is σ = 14992305300. Its totient is φ = 2939618304.

The previous prime is 6866386843. The next prime is 6866386861. The reversal of 6866386856 is 6586836686.

It can be written as a sum of positive squares in 2 ways, for example, as 6765062500 + 101324356 = 82250^2 + 10066^2 .

It is a hoax number, since the sum of its digits (62) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 382040 + ... + 399608.

Almost surely, 2^6866386856 is an apocalyptic number.

It is an amenable number.

6866386856 is an abundant number, since it is smaller than the sum of its proper divisors (8125918444).

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

6866386856 is a wasteful number, since it uses less digits than its factorization.

6866386856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18586 (or 18575 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 62.

The square root of 6866386856 is about 82863.6642684838. The cubic root of 6866386856 is about 1900.6818287911.

The spelling of 6866386856 in words is "six billion, eight hundred sixty-six million, three hundred eighty-six thousand, eight hundred fifty-six".