6622663 has 2 divisors, whose sum is σ = 6622664. Its totient is φ = 6622662.

The previous prime is 6622661. The next prime is 6622703. The reversal of 6622663 is 3662266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6622663 - 2¹ = 6622661 is a prime.

Together with 6622661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6622661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3311331 + 3311332.

It is an arithmetic number, because the mean of its divisors is an integer number (3311332).

Almost surely, 2^6622663 is an apocalyptic number.

6622663 is a deficient number, since it is larger than the sum of its proper divisors (1).

6622663 is an equidigital number, since it uses as much as digits as its factorization.

6622663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 31.

The square root of 6622663 is about 2573.4535161918. The cubic root of 6622663 is about 187.7922009885.

The spelling of 6622663 in words is "six million, six hundred twenty-two thousand, six hundred sixty-three".