6688746882 has 20 divisors (see below), whose sum is σ = 14987748006. Its totient is φ = 2229582240.

The previous prime is 6688746839. The next prime is 6688746901. The reversal of 6688746882 is 2886478866.

It can be written as a sum of positive squares in only one way, i.e., 6501358161 + 187388721 = 80631^2 + 13689^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20644119 + ... + 20644442.

Almost surely, 2^6688746882 is an apocalyptic number.

6688746882 is an abundant number, since it is smaller than the sum of its proper divisors (8299001124).

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

6688746882 is a wasteful number, since it uses less digits than its factorization.

6688746882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41288575 (or 41288566 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 63.

The square root of 6688746882 is about 81784.7594726548. The cubic root of 6688746882 is about 1884.1475958448.

The spelling of 6688746882 in words is "six billion, six hundred eighty-eight million, seven hundred forty-six thousand, eight hundred eighty-two".