6277664639 has 2 divisors, whose sum is σ = 6277664640. Its totient is φ = 6277664638.

The previous prime is 6277664621. The next prime is 6277664663. The reversal of 6277664639 is 9364667726.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6277664639 - 2⁸ = 6277664383 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6277664609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3138832319 + 3138832320.

It is an arithmetic number, because the mean of its divisors is an integer number (3138832320).

Almost surely, 2^6277664639 is an apocalyptic number.

6277664639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6277664639 is an equidigital number, since it uses as much as digits as its factorization.

6277664639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 56.

The square root of 6277664639 is about 79231.7148558581. The cubic root of 6277664639 is about 1844.7295465576.

The spelling of 6277664639 in words is "six billion, two hundred seventy-seven million, six hundred sixty-four thousand, six hundred thirty-nine".