6868778686 has 96 divisors (see below), whose sum is σ = 13470750720. Its totient is φ = 2568456000.

The previous prime is 6868778663. The next prime is 6868778701.

6868778686 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7298976 + ... + 7299916.

It is an arithmetic number, because the mean of its divisors is an integer number (140320320).

Almost surely, 2^6868778686 is an apocalyptic number.

6868778686 is a deficient number, since it is larger than the sum of its proper divisors (6601972034).

6868778686 is a wasteful number, since it uses less digits than its factorization.

6868778686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1131 counting only the distinct ones).

The product of its digits is 260112384, while the sum is 70.

The square root of 6868778686 is about 82878.0953328441. The cubic root of 6868778686 is about 1900.9024970092.

The spelling of 6868778686 in words is "six billion, eight hundred sixty-eight million, seven hundred seventy-eight thousand, six hundred eighty-six".