6621868 has 12 divisors (see below), whose sum is σ = 12641832. Its totient is φ = 3009920.

The previous prime is 6621851. The next prime is 6621883. The reversal of 6621868 is 8681266.

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, 75205 + ... + 75292.

It is an arithmetic number, because the mean of its divisors is an integer number (1053486).

Almost surely, 2^6621868 is an apocalyptic number.

It is an amenable number.

6621868 is a deficient number, since it is larger than the sum of its proper divisors (6019964).

6621868 is a wasteful number, since it uses less digits than its factorization.

6621868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150512 (or 150510 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 6621868 is about 2573.2990498580. The cubic root of 6621868 is about 187.7846863490.

The spelling of 6621868 in words is "six million, six hundred twenty-one thousand, eight hundred sixty-eight".