6639790319 has 2 divisors, whose sum is σ = 6639790320. Its totient is φ = 6639790318.

The previous prime is 6639790247. The next prime is 6639790349. The reversal of 6639790319 is 9130979366.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6639790319 - 2²⁸ = 6371354863 is a prime.

It is a super-2 number, since 2×6639790319² = 88173630960572243522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6639790349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3319895159 + 3319895160.

It is an arithmetic number, because the mean of its divisors is an integer number (3319895160).

Almost surely, 2^6639790319 is an apocalyptic number.

6639790319 is a deficient number, since it is larger than the sum of its proper divisors (1).

6639790319 is an equidigital number, since it uses as much as digits as its factorization.

6639790319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1653372, while the sum is 53.

The square root of 6639790319 is about 81484.9085352619. The cubic root of 6639790319 is about 1879.5394902508.

The spelling of 6639790319 in words is "six billion, six hundred thirty-nine million, seven hundred ninety thousand, three hundred nineteen".