6399682065 has 24 divisors (see below), whose sum is σ = 12677466048. Its totient is φ = 2925568800.

The previous prime is 6399682031. The next prime is 6399682141. The reversal of 6399682065 is 5602869936.

It is not a de Polignac number, because 6399682065 - 2⁹ = 6399681553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10157911 + ... + 10158540.

It is an arithmetic number, because the mean of its divisors is an integer number (528227752).

Almost surely, 2^6399682065 is an apocalyptic number.

It is an amenable number.

6399682065 is a deficient number, since it is larger than the sum of its proper divisors (6277783983).

6399682065 is a wasteful number, since it uses less digits than its factorization.

6399682065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20316469 (or 20316466 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The square root of 6399682065 is about 79998.0128815710. The cubic root of 6399682065 is about 1856.6047886955.

The spelling of 6399682065 in words is "six billion, three hundred ninety-nine million, six hundred eighty-two thousand, sixty-five".