6693641988 has 48 divisors (see below), whose sum is σ = 17043269376. Its totient is φ = 2027792160.

The previous prime is 6693641971. The next prime is 6693642013. The reversal of 6693641988 is 8891463966.

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, 745695 + ... + 754617.

It is an arithmetic number, because the mean of its divisors is an integer number (355068112).

Almost surely, 2^6693641988 is an apocalyptic number.

It is an amenable number.

6693641988 is an abundant number, since it is smaller than the sum of its proper divisors (10349627388).

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

6693641988 is a wasteful number, since it uses less digits than its factorization.

6693641988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14624 (or 14622 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 60.

The square root of 6693641988 is about 81814.6807608512. The cubic root of 6693641988 is about 1884.6071165556.

The spelling of 6693641988 in words is "six billion, six hundred ninety-three million, six hundred forty-one thousand, nine hundred eighty-eight".