6643252253 has 8 divisors (see below), whose sum is σ = 7248040320. Its totient is φ = 6038606880.

The previous prime is 6643252241. The next prime is 6643252267. The reversal of 6643252253 is 3522523466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6643252253 - 2⁸ = 6643251997 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 (6643252453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77228 + ... + 138746.

It is an arithmetic number, because the mean of its divisors is an integer number (906005040).

Almost surely, 2^6643252253 is an apocalyptic number.

It is an amenable number.

6643252253 is a deficient number, since it is larger than the sum of its proper divisors (604788067).

6643252253 is a wasteful number, since it uses less digits than its factorization.

6643252253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71347.

The product of its digits is 259200, while the sum is 38.

The square root of 6643252253 is about 81506.1485594799. The cubic root of 6643252253 is about 1879.8660924881.

The spelling of 6643252253 in words is "six billion, six hundred forty-three million, two hundred fifty-two thousand, two hundred fifty-three".