6686008656 has 40 divisors (see below), whose sum is σ = 17515468224. Its totient is φ = 2197278720.

The previous prime is 6686008631. The next prime is 6686008657. The reversal of 6686008656 is 6568006866.

It is a junction number, because it is equal to n+sod(n) for n = 6686008599 and 6686008608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686008657) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 977521 + ... + 984336.

Almost surely, 2^6686008656 is an apocalyptic number.

It is an amenable number.

6686008656 is an abundant number, since it is smaller than the sum of its proper divisors (10829459568).

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

6686008656 is a wasteful number, since it uses less digits than its factorization.

6686008656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961939 (or 1961933 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 51.

The square root of 6686008656 is about 81768.0173172861. The cubic root of 6686008656 is about 1883.8904512102.

The spelling of 6686008656 in words is "six billion, six hundred eighty-six million, eight thousand, six hundred fifty-six".