665172411774 has 16 divisors (see below), whose sum is σ = 1432679040912. Its totient is φ = 204668434368.

The previous prime is 665172411767. The next prime is 665172411779. The reversal of 665172411774 is 477114271566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665172411779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4263925639 + ... + 4263925794.

It is an arithmetic number, because the mean of its divisors is an integer number (89542440057).

Almost surely, 2^665172411774 is an apocalyptic number.

665172411774 is an abundant number, since it is smaller than the sum of its proper divisors (767506629138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665172411774 is a wasteful number, since it uses less digits than its factorization.

665172411774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8527851451.

The product of its digits is 1975680, while the sum is 51.

The spelling of 665172411774 in words is "six hundred sixty-five billion, one hundred seventy-two million, four hundred eleven thousand, seven hundred seventy-four".