6642225643 has 2 divisors, whose sum is σ = 6642225644. Its totient is φ = 6642225642.

The previous prime is 6642225593. The next prime is 6642225647. The reversal of 6642225643 is 3465222466.

6642225643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6642225643 is a prime.

It is a super-2 number, since 2×6642225643² = 88238322985053526898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6642225596 and 6642225605.

It is not a weakly prime, because it can be changed into another prime (6642225647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321112821 + 3321112822.

It is an arithmetic number, because the mean of its divisors is an integer number (3321112822).

Almost surely, 2^6642225643 is an apocalyptic number.

6642225643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6642225643 is an equidigital number, since it uses as much as digits as its factorization.

6642225643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 40.

The square root of 6642225643 is about 81499.8505704152. The cubic root of 6642225643 is about 1879.7692529345.

The spelling of 6642225643 in words is "six billion, six hundred forty-two million, two hundred twenty-five thousand, six hundred forty-three".