6686776228 has 24 divisors (see below), whose sum is σ = 12821919264. Its totient is φ = 3026049600.

The previous prime is 6686776207. The next prime is 6686776231. The reversal of 6686776228 is 8226776866.

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, 324753 + ... + 344728.

It is an arithmetic number, because the mean of its divisors is an integer number (534246636).

Almost surely, 2^6686776228 is an apocalyptic number.

It is an amenable number.

6686776228 is a deficient number, since it is larger than the sum of its proper divisors (6135143036).

6686776228 is a wasteful number, since it uses less digits than its factorization.

6686776228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669723 (or 669721 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 58.

The square root of 6686776228 is about 81772.7107781074. The cubic root of 6686776228 is about 1883.9625403695.

The spelling of 6686776228 in words is "six billion, six hundred eighty-six million, seven hundred seventy-six thousand, two hundred twenty-eight".