6688633128 has 64 divisors (see below), whose sum is σ = 17459072640. Its totient is φ = 2131329024.

The previous prime is 6688633111. The next prime is 6688633177. The reversal of 6688633128 is 8213368866.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1429000 + ... + 1433672.

It is an arithmetic number, because the mean of its divisors is an integer number (272798010).

Almost surely, 2^6688633128 is an apocalyptic number.

It is an amenable number.

6688633128 is an abundant number, since it is smaller than the sum of its proper divisors (10770439512).

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

6688633128 is a wasteful number, since it uses less digits than its factorization.

6688633128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7298 (or 7294 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 51.

The square root of 6688633128 is about 81784.0640222776. The cubic root of 6688633128 is about 1884.1369146941.

The spelling of 6688633128 in words is "six billion, six hundred eighty-eight million, six hundred thirty-three thousand, one hundred twenty-eight".