6624746399 has 4 divisors (see below), whose sum is σ = 6853185960. Its totient is φ = 6396306840.

The previous prime is 6624746393. The next prime is 6624746431. The reversal of 6624746399 is 9936474266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6624746399 - 2¹² = 6624742303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6624746393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114219737 + ... + 114219794.

It is an arithmetic number, because the mean of its divisors is an integer number (1713296490).

Almost surely, 2^6624746399 is an apocalyptic number.

6624746399 is a deficient number, since it is larger than the sum of its proper divisors (228439561).

6624746399 is a wasteful number, since it uses less digits than its factorization.

6624746399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228439560.

The product of its digits is 11757312, while the sum is 56.

The square root of 6624746399 is about 81392.5451070305. The cubic root of 6624746399 is about 1878.1189120796.

The spelling of 6624746399 in words is "six billion, six hundred twenty-four million, seven hundred forty-six thousand, three hundred ninety-nine".