664589334693 has 8 divisors (see below), whose sum is σ = 886155991456. Its totient is φ = 443041117200.

The previous prime is 664589334671. The next prime is 664589334701. The reversal of 664589334693 is 396433985466.

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

It is not a de Polignac number, because 664589334693 - 2⁹ = 664589334181 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 (664589334613) 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, 4525498 + ... + 4670043.

It is an arithmetic number, because the mean of its divisors is an integer number (110769498932).

Almost surely, 2^664589334693 is an apocalyptic number.

It is an amenable number.

664589334693 is a deficient number, since it is larger than the sum of its proper divisors (221566656763).

664589334693 is a wasteful number, since it uses less digits than its factorization.

664589334693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9219635.

The product of its digits is 302330880, while the sum is 66.

The spelling of 664589334693 in words is "six hundred sixty-four billion, five hundred eighty-nine million, three hundred thirty-four thousand, six hundred ninety-three".