79870566769 has 16 divisors (see below), whose sum is σ = 92636382592. Its totient is φ = 67445820288.

The previous prime is 79870566757. The next prime is 79870566799. The reversal of 79870566769 is 96766507897.

It is not a de Polignac number, because 79870566769 - 2¹⁵ = 79870534001 is a prime.

It is a super-2 number, since 2×79870566769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79870566698 and 79870566707.

It is not an unprimeable number, because it can be changed into a prime (79870566799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 362707 + ... + 539719.

It is an arithmetic number, because the mean of its divisors is an integer number (5789773912).

Almost surely, 2^79870566769 is an apocalyptic number.

It is an amenable number.

79870566769 is a deficient number, since it is larger than the sum of its proper divisors (12765815823).

79870566769 is a wasteful number, since it uses less digits than its factorization.

79870566769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177976.

The product of its (nonzero) digits is 240045120, while the sum is 70.

The spelling of 79870566769 in words is "seventy-nine billion, eight hundred seventy million, five hundred sixty-six thousand, seven hundred sixty-nine".