6681632866 has 16 divisors (see below), whose sum is σ = 10126209600. Its totient is φ = 3306271248.

The previous prime is 6681632819. The next prime is 6681632933. The reversal of 6681632866 is 6682361866.

It is a super-2 number, since 2×6681632866² = 89288435512022747912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342565 + ... + 361543.

It is an arithmetic number, because the mean of its divisors is an integer number (632888100).

Almost surely, 2^6681632866 is an apocalyptic number.

6681632866 is a deficient number, since it is larger than the sum of its proper divisors (3444576734).

6681632866 is a wasteful number, since it uses less digits than its factorization.

6681632866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20793.

The product of its digits is 2985984, while the sum is 52.

The square root of 6681632866 is about 81741.2555934884. The cubic root of 6681632866 is about 1883.4793784535.

Subtracting 6681632866 from its reverse (6682361866), we obtain a cube (729000 = 90³).

The spelling of 6681632866 in words is "six billion, six hundred eighty-one million, six hundred thirty-two thousand, eight hundred sixty-six".