665714058717 has 4 divisors (see below), whose sum is σ = 887618744960. Its totient is φ = 443809372476.

The previous prime is 665714058683. The next prime is 665714058731. The reversal of 665714058717 is 717850417566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 665714058717 - 2¹⁰ = 665714057693 is a prime.

It is a super-2 number, since 2×665714058717² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665714058787) 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, 110952343117 + ... + 110952343122.

It is an arithmetic number, because the mean of its divisors is an integer number (221904686240).

Almost surely, 2^665714058717 is an apocalyptic number.

It is an amenable number.

665714058717 is a deficient number, since it is larger than the sum of its proper divisors (221904686243).

665714058717 is a wasteful number, since it uses less digits than its factorization.

665714058717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221904686242.

The product of its (nonzero) digits is 9878400, while the sum is 57.

The spelling of 665714058717 in words is "six hundred sixty-five billion, seven hundred fourteen million, fifty-eight thousand, seven hundred seventeen".