664531153 has 18 divisors (see below), whose sum is σ = 790968822. Its totient is φ = 557631360.

The previous prime is 664531151. The next prime is 664531163. The reversal of 664531153 is 351135466.

It can be written as a sum of positive squares in 3 ways, for example, as 20539024 + 643992129 = 4532^2 + 25377^2 .

It is not a de Polignac number, because 664531153 - 2¹ = 664531151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664531151) 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 17 ways as a sum of consecutive naturals, for example, 4201 + ... + 36697.

Almost surely, 2^664531153 is an apocalyptic number.

It is an amenable number.

664531153 is a deficient number, since it is larger than the sum of its proper divisors (126437669).

664531153 is a wasteful number, since it uses less digits than its factorization.

664531153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32545 (or 32521 counting only the distinct ones).

The product of its digits is 32400, while the sum is 34.

The square root of 664531153 is about 25778.5017601877. The cubic root of 664531153 is about 872.6466954762.

The spelling of 664531153 in words is "six hundred sixty-four million, five hundred thirty-one thousand, one hundred fifty-three".