6688543924 has 24 divisors (see below), whose sum is σ = 11931409728. Its totient is φ = 3280058880.

The previous prime is 6688543891. The next prime is 6688543949. The reversal of 6688543924 is 4293458866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6202 + ... + 115825.

It is an arithmetic number, because the mean of its divisors is an integer number (497142072).

Almost surely, 2^6688543924 is an apocalyptic number.

It is an amenable number.

6688543924 is a deficient number, since it is larger than the sum of its proper divisors (5242865804).

6688543924 is a wasteful number, since it uses less digits than its factorization.

6688543924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122295 (or 122293 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 55.

The square root of 6688543924 is about 81783.5186574899. The cubic root of 6688543924 is about 1884.1285386281.

The spelling of 6688543924 in words is "six billion, six hundred eighty-eight million, five hundred forty-three thousand, nine hundred twenty-four".