6637668 has 12 divisors (see below), whose sum is σ = 15487920. Its totient is φ = 2212552.

The previous prime is 6637651. The next prime is 6637679. The reversal of 6637668 is 8667366.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276558 + ... + 276581.

It is an arithmetic number, because the mean of its divisors is an integer number (1290660).

Almost surely, 2^6637668 is an apocalyptic number.

It is an amenable number.

6637668 is an abundant number, since it is smaller than the sum of its proper divisors (8850252).

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

6637668 is a wasteful number, since it uses less digits than its factorization.

6637668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553146 (or 553144 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The square root of 6637668 is about 2576.3672098519. The cubic root of 6637668 is about 187.9339212468.

The spelling of 6637668 in words is "six million, six hundred thirty-seven thousand, six hundred sixty-eight".