6642988 has 48 divisors (see below), whose sum is σ = 13716864. Its totient is φ = 2781440.

The previous prime is 6642919. The next prime is 6642991. The reversal of 6642988 is 8892466.

It is a happy number.

6642988 is a modest number, since divided by 2988 gives 664 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62031 + ... + 62137.

It is an arithmetic number, because the mean of its divisors is an integer number (285768).

Almost surely, 2^6642988 is an apocalyptic number.

6642988 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6642988 is an abundant number, since it is smaller than the sum of its proper divisors (7073876).

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

6642988 is a wasteful number, since it uses less digits than its factorization.

6642988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 220 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 6642988 is about 2577.3994645766. The cubic root of 6642988 is about 187.9841166602.

The spelling of 6642988 in words is "six million, six hundred forty-two thousand, nine hundred eighty-eight".