6624640423 has 2 divisors, whose sum is σ = 6624640424. Its totient is φ = 6624640422.

The previous prime is 6624640411. The next prime is 6624640439. The reversal of 6624640423 is 3240464266.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6624640423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6624640403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3312320211 + 3312320212.

It is an arithmetic number, because the mean of its divisors is an integer number (3312320212).

Almost surely, 2^6624640423 is an apocalyptic number.

6624640423 is a deficient number, since it is larger than the sum of its proper divisors (1).

6624640423 is an equidigital number, since it uses as much as digits as its factorization.

6624640423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 37.

The square root of 6624640423 is about 81391.8940865735. The cubic root of 6624640423 is about 1878.1088972766.

The spelling of 6624640423 in words is "six billion, six hundred twenty-four million, six hundred forty thousand, four hundred twenty-three".