664364527 has 2 divisors, whose sum is σ = 664364528. Its totient is φ = 664364526.

The previous prime is 664364501. The next prime is 664364579. The reversal of 664364527 is 725463466.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664364527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664364587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332182263 + 332182264.

It is an arithmetic number, because the mean of its divisors is an integer number (332182264).

Almost surely, 2^664364527 is an apocalyptic number.

664364527 is a deficient number, since it is larger than the sum of its proper divisors (1).

664364527 is an equidigital number, since it uses as much as digits as its factorization.

664364527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 43.

The square root of 664364527 is about 25775.2696785116. The cubic root of 664364527 is about 872.5737529300.

The spelling of 664364527 in words is "six hundred sixty-four million, three hundred sixty-four thousand, five hundred twenty-seven".