6642613 has 2 divisors, whose sum is σ = 6642614. Its totient is φ = 6642612.

The previous prime is 6642593. The next prime is 6642619. The reversal of 6642613 is 3162466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4401604 + 2241009 = 2098^2 + 1497^2 .

It is a cyclic number.

It is not a de Polignac number, because 6642613 - 2¹⁷ = 6511541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6642619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321306 + 3321307.

It is an arithmetic number, because the mean of its divisors is an integer number (3321307).

Almost surely, 2^6642613 is an apocalyptic number.

It is an amenable number.

6642613 is a deficient number, since it is larger than the sum of its proper divisors (1).

6642613 is an equidigital number, since it uses as much as digits as its factorization.

6642613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 6642613 is about 2577.3267158046. The cubic root of 6642613 is about 187.9805793278.

The spelling of 6642613 in words is "six million, six hundred forty-two thousand, six hundred thirteen".