679667485165 has 4 divisors (see below), whose sum is σ = 815600982204. Its totient is φ = 543733988128.

The previous prime is 679667485061. The next prime is 679667485169. The reversal of 679667485165 is 561584766976.

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 97202403529 + 582465081636 = 311773^2 + 763194^2 .

It is a cyclic number.

It is not a de Polignac number, because 679667485165 - 2²⁵ = 679633930733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 679667485094 and 679667485103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679667485169) 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, 67966748512 + ... + 67966748521.

It is an arithmetic number, because the mean of its divisors is an integer number (203900245551).

Almost surely, 2^679667485165 is an apocalyptic number.

It is an amenable number.

679667485165 is a deficient number, since it is larger than the sum of its proper divisors (135933497039).

679667485165 is a wasteful number, since it uses less digits than its factorization.

679667485165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135933497038.

The product of its digits is 457228800, while the sum is 70.

The spelling of 679667485165 in words is "six hundred seventy-nine billion, six hundred sixty-seven million, four hundred eighty-five thousand, one hundred sixty-five".