6399308077 has 4 divisors (see below), whose sum is σ = 6535463616. Its totient is φ = 6263152540.

The previous prime is 6399308039. The next prime is 6399308089. The reversal of 6399308077 is 7708039936.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6399308077 - 2¹⁹ = 6398783789 is a prime.

It is a super-2 number, since 2×6399308077² = 81902287728714875858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399308177) 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, 68077699 + ... + 68077792.

It is an arithmetic number, because the mean of its divisors is an integer number (1633865904).

Almost surely, 2^6399308077 is an apocalyptic number.

It is an amenable number.

6399308077 is a deficient number, since it is larger than the sum of its proper divisors (136155539).

6399308077 is a wasteful number, since it uses less digits than its factorization.

6399308077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136155538.

The product of its (nonzero) digits is 1714608, while the sum is 52.

The square root of 6399308077 is about 79995.6753643595. The cubic root of 6399308077 is about 1856.5686222406.

The spelling of 6399308077 in words is "six billion, three hundred ninety-nine million, three hundred eight thousand, seventy-seven".