6642863 has 2 divisors, whose sum is σ = 6642864. Its totient is φ = 6642862.

The previous prime is 6642847. The next prime is 6642877. The reversal of 6642863 is 3682466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6642863 - 2⁴ = 6642847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6642803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321431 + 3321432.

It is an arithmetic number, because the mean of its divisors is an integer number (3321432).

Almost surely, 2^6642863 is an apocalyptic number.

6642863 is a deficient number, since it is larger than the sum of its proper divisors (1).

6642863 is an equidigital number, since it uses as much as digits as its factorization.

6642863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 35.

The square root of 6642863 is about 2577.3752152141. The cubic root of 6642863 is about 187.9829375642.

The spelling of 6642863 in words is "six million, six hundred forty-two thousand, eight hundred sixty-three".