665170518674 has 16 divisors (see below), whose sum is σ = 1002623693568. Its totient is φ = 330963792912.

The previous prime is 665170518641. The next prime is 665170518679. The reversal of 665170518674 is 476815071566.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (665170518679) 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, 848789 + ... + 1432055.

It is an arithmetic number, because the mean of its divisors is an integer number (62663980848).

Almost surely, 2^665170518674 is an apocalyptic number.

665170518674 is a deficient number, since it is larger than the sum of its proper divisors (337453174894).

665170518674 is a wasteful number, since it uses less digits than its factorization.

665170518674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586049.

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 665170518674 in words is "six hundred sixty-five billion, one hundred seventy million, five hundred eighteen thousand, six hundred seventy-four".