664075597 has 2 divisors, whose sum is σ = 664075598. Its totient is φ = 664075596.

The previous prime is 664075591. The next prime is 664075609. The reversal of 664075597 is 795570466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388050601 + 276024996 = 19699^2 + 16614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664075597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664075597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664075591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332037798 + 332037799.

It is an arithmetic number, because the mean of its divisors is an integer number (332037799).

Almost surely, 2^664075597 is an apocalyptic number.

It is an amenable number.

664075597 is a deficient number, since it is larger than the sum of its proper divisors (1).

664075597 is an equidigital number, since it uses as much as digits as its factorization.

664075597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The square root of 664075597 is about 25769.6642779839. The cubic root of 664075597 is about 872.4472414137.

The spelling of 664075597 in words is "six hundred sixty-four million, seventy-five thousand, five hundred ninety-seven".