664222545 has 32 divisors (see below), whose sum is σ = 1349533440. Its totient is φ = 303644160.

The previous prime is 664222529. The next prime is 664222549. The reversal of 664222545 is 545222466.

664222545 is a `hidden beast` number, since 6 + 642 + 2 + 2 + 5 + 4 + 5 = 666.

It is not a de Polignac number, because 664222545 - 2⁴ = 664222529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (664222549) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 350496 + ... + 352385.

It is an arithmetic number, because the mean of its divisors is an integer number (42172920).

Almost surely, 2^664222545 is an apocalyptic number.

It is an amenable number.

664222545 is an abundant number, since it is smaller than the sum of its proper divisors (685310895).

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

664222545 is a wasteful number, since it uses less digits than its factorization.

664222545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702902 (or 702896 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 664222545 is about 25772.5153021586. The cubic root of 664222545 is about 872.5115889682.

The spelling of 664222545 in words is "six hundred sixty-four million, two hundred twenty-two thousand, five hundred forty-five".