6639706367 has 16 divisors (see below), whose sum is σ = 7675021824. Its totient is φ = 5626260000.

The previous prime is 6639706349. The next prime is 6639706373. The reversal of 6639706367 is 7636079366.

6639706367 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6639706367 - 2⁸ = 6639706111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639706867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481742 + ... + 495332.

It is an arithmetic number, because the mean of its divisors is an integer number (479688864).

Almost surely, 2^6639706367 is an apocalyptic number.

6639706367 is a deficient number, since it is larger than the sum of its proper divisors (1035315457).

6639706367 is a wasteful number, since it uses less digits than its factorization.

6639706367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14390.

The product of its (nonzero) digits is 5143824, while the sum is 53.

The square root of 6639706367 is about 81484.3933952999. The cubic root of 6639706367 is about 1879.5315687273.

The spelling of 6639706367 in words is "six billion, six hundred thirty-nine million, seven hundred six thousand, three hundred sixty-seven".