6399899067 has 64 divisors (see below), whose sum is σ = 9867571200. Its totient is φ = 3662807040.

The previous prime is 6399899053. The next prime is 6399899069. The reversal of 6399899067 is 7609989936.

It is not a de Polignac number, because 6399899067 - 2¹⁵ = 6399866299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6399898989 and 6399899007.

It is not an unprimeable number, because it can be changed into a prime (6399899069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7719609 + ... + 7720437.

It is an arithmetic number, because the mean of its divisors is an integer number (154180800).

Almost surely, 2^6399899067 is an apocalyptic number.

6399899067 is a deficient number, since it is larger than the sum of its proper divisors (3467672133).

6399899067 is a wasteful number, since it uses less digits than its factorization.

6399899067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156.

The product of its (nonzero) digits is 39680928, while the sum is 66.

The square root of 6399899067 is about 79999.3691662628. The cubic root of 6399899067 is about 1856.6257731962.

The spelling of 6399899067 in words is "six billion, three hundred ninety-nine million, eight hundred ninety-nine thousand, sixty-seven".