664752577 has 2 divisors, whose sum is σ = 664752578. Its totient is φ = 664752576.

The previous prime is 664752533. The next prime is 664752589. The reversal of 664752577 is 775257466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 621205776 + 43546801 = 24924^2 + 6599^2 .

It is a cyclic number.

It is not a de Polignac number, because 664752577 - 2²³ = 656363969 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664752577.

It is not a weakly prime, because it can be changed into another prime (664755577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332376288 + 332376289.

It is an arithmetic number, because the mean of its divisors is an integer number (332376289).

Almost surely, 2^664752577 is an apocalyptic number.

It is an amenable number.

664752577 is a deficient number, since it is larger than the sum of its proper divisors (1).

664752577 is an equidigital number, since it uses as much as digits as its factorization.

664752577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2469600, while the sum is 49.

The square root of 664752577 is about 25782.7961439406. The cubic root of 664752577 is about 872.7436076445.

The spelling of 664752577 in words is "six hundred sixty-four million, seven hundred fifty-two thousand, five hundred seventy-seven".