665876322718 has 32 divisors (see below), whose sum is σ = 1139147919360. Its totient is φ = 290060791680.

The previous prime is 665876322647. The next prime is 665876322767. The reversal of 665876322718 is 817223678566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13709698 + ... + 13758181.

It is an arithmetic number, because the mean of its divisors is an integer number (35598372480).

Almost surely, 2^665876322718 is an apocalyptic number.

665876322718 is a deficient number, since it is larger than the sum of its proper divisors (473271596642).

665876322718 is a wasteful number, since it uses less digits than its factorization.

665876322718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27467952.

The product of its digits is 40642560, while the sum is 61.

The spelling of 665876322718 in words is "six hundred sixty-five billion, eight hundred seventy-six million, three hundred twenty-two thousand, seven hundred eighteen".