6686868764 has 24 divisors (see below), whose sum is σ = 12089150976. Its totient is φ = 3232998000.

The previous prime is 6686868751. The next prime is 6686868767. The reversal of 6686868764 is 4678686866.

It is a self number, because there is not a number n which added to its sum of digits gives 6686868764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686868767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139199 + ... + 180969.

It is an arithmetic number, because the mean of its divisors is an integer number (503714624).

Almost surely, 2^6686868764 is an apocalyptic number.

It is an amenable number.

6686868764 is a deficient number, since it is larger than the sum of its proper divisors (5402282212).

6686868764 is a wasteful number, since it uses less digits than its factorization.

6686868764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43097 (or 43095 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 65.

The square root of 6686868764 is about 81773.2765883819. The cubic root of 6686868764 is about 1883.9712308329.

The spelling of 6686868764 in words is "six billion, six hundred eighty-six million, eight hundred sixty-eight thousand, seven hundred sixty-four".