664565022 has 24 divisors (see below), whose sum is σ = 1570790520. Its totient is φ = 201383280.

The previous prime is 664565017. The next prime is 664565053. The reversal of 664565022 is 220565466.

664565022 is a `hidden beast` number, since 6 + 645 + 6 + 5 + 0 + 2 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1677997 + ... + 1678392.

It is an arithmetic number, because the mean of its divisors is an integer number (65449605).

Almost surely, 2^664565022 is an apocalyptic number.

664565022 is an abundant number, since it is smaller than the sum of its proper divisors (906225498).

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

664565022 is a wasteful number, since it uses less digits than its factorization.

664565022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356408 (or 3356405 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 664565022 is about 25779.1586751779. The cubic root of 664565022 is about 872.6615205494.

The spelling of 664565022 in words is "six hundred sixty-four million, five hundred sixty-five thousand, twenty-two".