6643252 has 24 divisors (see below), whose sum is σ = 14495040. Its totient is φ = 2588160.

The previous prime is 6643249. The next prime is 6643261. The reversal of 6643252 is 2523466.

It is a happy number.

6643252 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

6643252 is strictly pandigital in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 6643252.

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, 10477 + ... + 11092.

It is an arithmetic number, because the mean of its divisors is an integer number (603960).

Almost surely, 2^6643252 is an apocalyptic number.

It is an amenable number.

6643252 is an abundant number, since it is smaller than the sum of its proper divisors (7851788).

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

6643252 is a wasteful number, since it uses less digits than its factorization.

6643252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21591 (or 21589 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 6643252 is about 2577.4506784806. The cubic root of 6643252 is about 187.9866068624.

It can be divided in two parts, 664 and 3252, that added together give a triangular number (3916 = T₈₈).

The spelling of 6643252 in words is "six million, six hundred forty-three thousand, two hundred fifty-two".