6686843568 has 20 divisors (see below), whose sum is σ = 17274346008. Its totient is φ = 2228947840.

The previous prime is 6686843551. The next prime is 6686843587. The reversal of 6686843568 is 8653486866.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69654573 + ... + 69654668.

Almost surely, 2^6686843568 is an apocalyptic number.

It is an amenable number.

6686843568 is an abundant number, since it is smaller than the sum of its proper divisors (10587502440).

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

6686843568 is a wasteful number, since it uses less digits than its factorization.

6686843568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139309252 (or 139309246 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 60.

The square root of 6686843568 is about 81773.1225281266. The cubic root of 6686843568 is about 1883.9688645735.

The spelling of 6686843568 in words is "six billion, six hundred eighty-six million, eight hundred forty-three thousand, five hundred sixty-eight".