6879799565 has 4 divisors (see below), whose sum is σ = 8255759484. Its totient is φ = 5503839648.

The previous prime is 6879799561. The next prime is 6879799603. The reversal of 6879799565 is 5659979786.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3423888196 + 3455911369 = 58514^2 + 58787^2 .

It is a cyclic number.

It is not a de Polignac number, because 6879799565 - 2² = 6879799561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6879799561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687979952 + ... + 687979961.

It is an arithmetic number, because the mean of its divisors is an integer number (2063939871).

Almost surely, 2^6879799565 is an apocalyptic number.

It is an amenable number.

6879799565 is a deficient number, since it is larger than the sum of its proper divisors (1375959919).

6879799565 is a wasteful number, since it uses less digits than its factorization.

6879799565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375959918.

The product of its digits is 257191200, while the sum is 71.

The square root of 6879799565 is about 82944.5571752601. The cubic root of 6879799565 is about 1901.9186127249.

The spelling of 6879799565 in words is "six billion, eight hundred seventy-nine million, seven hundred ninety-nine thousand, five hundred sixty-five".