664752533 has 2 divisors, whose sum is σ = 664752534. Its totient is φ = 664752532.

The previous prime is 664752521. The next prime is 664752577. The reversal of 664752533 is 335257466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 653415844 + 11336689 = 25562^2 + 3367^2 .

It is a cyclic number.

It is not a de Polignac number, because 664752533 - 2¹² = 664748437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664752593) 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 as a sum of consecutive naturals, namely, 332376266 + 332376267.

It is an arithmetic number, because the mean of its divisors is an integer number (332376267).

Almost surely, 2^664752533 is an apocalyptic number.

It is an amenable number.

664752533 is a deficient number, since it is larger than the sum of its proper divisors (1).

664752533 is an equidigital number, since it uses as much as digits as its factorization.

664752533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 41.

The square root of 664752533 is about 25782.7952906585. The cubic root of 664752533 is about 872.7435883889.

The spelling of 664752533 in words is "six hundred sixty-four million, seven hundred fifty-two thousand, five hundred thirty-three".