6688700672 has 36 divisors (see below), whose sum is σ = 13577597040. Its totient is φ = 3287659008.

The previous prime is 6688700657. The next prime is 6688700713. The reversal of 6688700672 is 2760078866.

It is a happy number.

It is a super-2 number, since 2×6688700672² = 89477433359226503168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6688700672.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206318 + ... + 236525.

Almost surely, 2^6688700672 is an apocalyptic number.

It is an amenable number.

6688700672 is an abundant number, since it is smaller than the sum of its proper divisors (6888896368).

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

6688700672 is an equidigital number, since it uses as much as digits as its factorization.

6688700672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442918 (or 442904 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 50.

The square root of 6688700672 is about 81784.4769623185. The cubic root of 6688700672 is about 1884.1432568825.

The spelling of 6688700672 in words is "six billion, six hundred eighty-eight million, seven hundred thousand, six hundred seventy-two".