665434675213 has 32 divisors (see below), whose sum is σ = 897124958208. Its totient is φ = 477635884800.

The previous prime is 665434675211. The next prime is 665434675229. The reversal of 665434675213 is 312576434566.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 665434675213 - 2¹ = 665434675211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665434675211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5346493 + ... + 5469538.

It is an arithmetic number, because the mean of its divisors is an integer number (28035154944).

Almost surely, 2^665434675213 is an apocalyptic number.

It is an amenable number.

665434675213 is a deficient number, since it is larger than the sum of its proper divisors (231690282995).

665434675213 is a wasteful number, since it uses less digits than its factorization.

665434675213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10816113.

The product of its digits is 10886400, while the sum is 52.

The spelling of 665434675213 in words is "six hundred sixty-five billion, four hundred thirty-four million, six hundred seventy-five thousand, two hundred thirteen".