6642944 has 72 divisors (see below), whose sum is σ = 16580928. Its totient is φ = 2580480.

The previous prime is 6642919. The next prime is 6642991. The reversal of 6642944 is 4492466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19544 + ... + 19880.

Almost surely, 2^6642944 is an apocalyptic number.

6642944 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6642944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8290464).

6642944 is an abundant number, since it is smaller than the sum of its proper divisors (9937984).

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

6642944 is a wasteful number, since it uses less digits than its factorization.

6642944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371 (or 357 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 6642944 is about 2577.3909288271. The cubic root of 6642944 is about 187.9837016201.

The spelling of 6642944 in words is "six million, six hundred forty-two thousand, nine hundred forty-four".