664862588345 has 8 divisors (see below), whose sum is σ = 799075910976. Its totient is φ = 531062867376.

The previous prime is 664862588303. The next prime is 664862588359. The reversal of 664862588345 is 543885268466.

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

It is a cyclic number.

It is not a de Polignac number, because 664862588345 - 2¹⁰ = 664862587321 is a prime.

It is a super-2 number, since 2×664862588345² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103396877 + ... + 103403306.

It is an arithmetic number, because the mean of its divisors is an integer number (99884488872).

Almost surely, 2^664862588345 is an apocalyptic number.

It is an amenable number.

664862588345 is a deficient number, since it is larger than the sum of its proper divisors (134213322631).

664862588345 is a wasteful number, since it uses less digits than its factorization.

664862588345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206800831.

The product of its digits is 265420800, while the sum is 65.

The spelling of 664862588345 in words is "six hundred sixty-four billion, eight hundred sixty-two million, five hundred eighty-eight thousand, three hundred forty-five".