6624521253 has 20 divisors (see below), whose sum is σ = 11309589280. Its totient is φ = 3785440392.

The previous prime is 6624521213. The next prime is 6624521261. The reversal of 6624521253 is 3521254266.

6624521253 is a `hidden beast` number, since 6 + 624 + 5 + 2 + 1 + 25 + 3 = 666.

It is not a de Polignac number, because 6624521253 - 2⁸ = 6624520997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6624521213) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5841163 + ... + 5842296.

It is an arithmetic number, because the mean of its divisors is an integer number (565479464).

Almost surely, 2^6624521253 is an apocalyptic number.

6624521253 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

6624521253 is a deficient number, since it is larger than the sum of its proper divisors (4685068027).

6624521253 is a wasteful number, since it uses less digits than its factorization.

6624521253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11683478 (or 11683469 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 6624521253 is about 81391.1620079232. The cubic root of 6624521253 is about 1878.0976355041.

The spelling of 6624521253 in words is "six billion, six hundred twenty-four million, five hundred twenty-one thousand, two hundred fifty-three".