664311323231 has 4 divisors (see below), whose sum is σ = 678445606752. Its totient is φ = 650177039712.

The previous prime is 664311323197. The next prime is 664311323239. The reversal of 664311323231 is 132323113466.

664311323231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664311323231 is a prime.

It is a super-2 number, since 2×664311323231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664311323191 and 664311323200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664311323239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7067141690 + ... + 7067141783.

It is an arithmetic number, because the mean of its divisors is an integer number (169611401688).

Almost surely, 2^664311323231 is an apocalyptic number.

664311323231 is a deficient number, since it is larger than the sum of its proper divisors (14134283521).

664311323231 is a wasteful number, since it uses less digits than its factorization.

664311323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14134283520.

The product of its digits is 46656, while the sum is 35.

Adding to 664311323231 its reverse (132323113466), we get a palindrome (796634436697).

The spelling of 664311323231 in words is "six hundred sixty-four billion, three hundred eleven million, three hundred twenty-three thousand, two hundred thirty-one".