6643022653 has 4 divisors (see below), whose sum is σ = 6645899488. Its totient is φ = 6640145820.

The previous prime is 6643022641. The next prime is 6643022669. The reversal of 6643022653 is 3562203466.

6643022653 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6643022653 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 (6643022453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1434951 + ... + 1439572.

It is an arithmetic number, because the mean of its divisors is an integer number (1661474872).

Almost surely, 2^6643022653 is an apocalyptic number.

It is an amenable number.

6643022653 is a deficient number, since it is larger than the sum of its proper divisors (2876835).

6643022653 is a wasteful number, since it uses less digits than its factorization.

6643022653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876834.

The product of its (nonzero) digits is 155520, while the sum is 37.

The square root of 6643022653 is about 81504.7400646122. The cubic root of 6643022653 is about 1879.8444353133.

The spelling of 6643022653 in words is "six billion, six hundred forty-three million, twenty-two thousand, six hundred fifty-three".