6399679105 has 16 divisors (see below), whose sum is σ = 7733177280. Its totient is φ = 5084088768.

The previous prime is 6399679093. The next prime is 6399679147. The reversal of 6399679105 is 5019769936.

It is a cyclic number.

It is not a de Polignac number, because 6399679105 - 2¹³ = 6399670913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1284399 + ... + 1289371.

It is an arithmetic number, because the mean of its divisors is an integer number (483323580).

Almost surely, 2^6399679105 is an apocalyptic number.

It is an amenable number.

6399679105 is a deficient number, since it is larger than the sum of its proper divisors (1333498175).

6399679105 is a wasteful number, since it uses less digits than its factorization.

6399679105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720.

The product of its (nonzero) digits is 2755620, while the sum is 55.

The square root of 6399679105 is about 79997.9943811093. The cubic root of 6399679105 is about 1856.6045024546.

The spelling of 6399679105 in words is "six billion, three hundred ninety-nine million, six hundred seventy-nine thousand, one hundred five".