664024591 has 2 divisors, whose sum is σ = 664024592. Its totient is φ = 664024590.

The previous prime is 664024583. The next prime is 664024693. The reversal of 664024591 is 195420466.

664024591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664024591 - 2³ = 664024583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664024591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664024531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332012295 + 332012296.

It is an arithmetic number, because the mean of its divisors is an integer number (332012296).

Almost surely, 2^664024591 is an apocalyptic number.

664024591 is a deficient number, since it is larger than the sum of its proper divisors (1).

664024591 is an equidigital number, since it uses as much as digits as its factorization.

664024591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 664024591 is about 25768.6746069719. The cubic root of 664024591 is about 872.4249040054.

The spelling of 664024591 in words is "six hundred sixty-four million, twenty-four thousand, five hundred ninety-one".