6656624 has 20 divisors (see below), whose sum is σ = 13889736. Its totient is φ = 3072192.

The previous prime is 6656623. The next prime is 6656627. The reversal of 6656624 is 4266566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15794 + ... + 16209.

Almost surely, 2^6656624 is an apocalyptic number.

It is an amenable number.

6656624 is an abundant number, since it is smaller than the sum of its proper divisors (7233112).

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

6656624 is a wasteful number, since it uses less digits than its factorization.

6656624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32024 (or 32018 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 6656624 is about 2580.0434104875. The cubic root of 6656624 is about 188.1126531707.

The spelling of 6656624 in words is "six million, six hundred fifty-six thousand, six hundred twenty-four".