6642868 has 12 divisors (see below), whose sum is σ = 11644192. Its totient is φ = 3315960.

The previous prime is 6642863. The next prime is 6642877. The reversal of 6642868 is 8682466.

It is a self number, because there is not a number n which added to its sum of digits gives 6642868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642863) 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, 2713 + ... + 4543.

Almost surely, 2^6642868 is an apocalyptic number.

It is an amenable number.

6642868 is a deficient number, since it is larger than the sum of its proper divisors (5001324).

6642868 is a wasteful number, since it uses less digits than its factorization.

6642868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742 (or 2740 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 6642868 is about 2577.3761851930. The cubic root of 6642868 is about 187.9829847283.

The spelling of 6642868 in words is "six million, six hundred forty-two thousand, eight hundred sixty-eight".