664164522 has 120 divisors (see below), whose sum is σ = 1787702400. Its totient is φ = 183571920.

The previous prime is 664164503. The next prime is 664164539. The reversal of 664164522 is 225461466.

664164522 is a `hidden beast` number, since 6 + 6 + 4 + 1 + 645 + 2 + 2 = 666.

664164522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×664164522² = 882229024566976968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 244729 + ... + 247427.

It is an arithmetic number, because the mean of its divisors is an integer number (14897520).

Almost surely, 2^664164522 is an apocalyptic number.

664164522 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 664164522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (893851200).

664164522 is an abundant number, since it is smaller than the sum of its proper divisors (1123537878).

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

664164522 is a wasteful number, since it uses less digits than its factorization.

664164522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758 (or 2742 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 664164522 is about 25771.3896016493. The cubic root of 664164522 is about 872.4861822154.

The spelling of 664164522 in words is "six hundred sixty-four million, one hundred sixty-four thousand, five hundred twenty-two".