664404031211022 has 24 divisors (see below), whose sum is σ = 1478448609993576. Its totient is φ = 215482388500656.

The previous prime is 664404031210993. The next prime is 664404031211071. The reversal of 664404031211022 is 220112130404466.

664404031211022 is a `hidden beast` number, since 6 + 6 + 4 + 404 + 0 + 31 + 211 + 0 + 2 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 498801824568 + ... + 498801825899.

It is an arithmetic number, because the mean of its divisors is an integer number (61602025416399).

Almost surely, 2^{664404031211022} is an apocalyptic number.

664404031211022 is an abundant number, since it is smaller than the sum of its proper divisors (814044578782554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664404031211022 is a wasteful number, since it uses less digits than its factorization.

664404031211022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997603650512 (or 997603650509 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

Adding to 664404031211022 its reverse (220112130404466), we get a palindrome (884516161615488).

The spelling of 664404031211022 in words is "six hundred sixty-four trillion, four hundred four billion, thirty-one million, two hundred eleven thousand, twenty-two".