665434658373 has 8 divisors (see below), whose sum is σ = 887266564128. Its totient is φ = 443612929104.

The previous prime is 665434658363. The next prime is 665434658377. The reversal of 665434658373 is 373856434566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665434658373 - 2⁹ = 665434657861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665434658377) 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, 2390215 + ... + 2654052.

It is an arithmetic number, because the mean of its divisors is an integer number (110908320516).

Almost surely, 2^665434658373 is an apocalyptic number.

It is an amenable number.

665434658373 is a deficient number, since it is larger than the sum of its proper divisors (221831905755).

665434658373 is a wasteful number, since it uses less digits than its factorization.

665434658373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088243.

The product of its digits is 130636800, while the sum is 60.

The spelling of 665434658373 in words is "six hundred sixty-five billion, four hundred thirty-four million, six hundred fifty-eight thousand, three hundred seventy-three".