6399069879 has 32 divisors (see below), whose sum is σ = 8903983104. Its totient is φ = 4083337440.

The previous prime is 6399069877. The next prime is 6399069893. The reversal of 6399069879 is 9789609936.

It is not a de Polignac number, because 6399069879 - 2¹ = 6399069877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399069877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5231662 + ... + 5232884.

It is an arithmetic number, because the mean of its divisors is an integer number (278249472).

Almost surely, 2^6399069879 is an apocalyptic number.

6399069879 is a deficient number, since it is larger than the sum of its proper divisors (2504913225).

6399069879 is a wasteful number, since it uses less digits than its factorization.

6399069879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827.

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

The square root of 6399069879 is about 79994.1865325225. The cubic root of 6399069879 is about 1856.5455866033.

The spelling of 6399069879 in words is "six billion, three hundred ninety-nine million, sixty-nine thousand, eight hundred seventy-nine".