6628664 has 16 divisors (see below), whose sum is σ = 14204400. Its totient is φ = 2840832.

The previous prime is 6628651. The next prime is 6628667. The reversal of 6628664 is 4668266.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6628667) 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, 59129 + ... + 59240.

It is an arithmetic number, because the mean of its divisors is an integer number (887775).

Almost surely, 2^6628664 is an apocalyptic number.

It is an amenable number.

6628664 is an abundant number, since it is smaller than the sum of its proper divisors (7575736).

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

6628664 is a wasteful number, since it uses less digits than its factorization.

6628664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118382 (or 118378 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 6628664 is about 2574.6191951432. The cubic root of 6628664 is about 187.8489053074.

The spelling of 6628664 in words is "six million, six hundred twenty-eight thousand, six hundred sixty-four".