664252893 has 12 divisors (see below), whose sum is σ = 995012928. Its totient is φ = 442835100.

The previous prime is 664252829. The next prime is 664252909. The reversal of 664252893 is 398252466.

It is not a de Polignac number, because 664252893 - 2⁶ = 664252829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664252093) 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 in 11 ways as a sum of consecutive naturals, for example, 1366533 + ... + 1367018.

It is an arithmetic number, because the mean of its divisors is an integer number (82917744).

Almost surely, 2^664252893 is an apocalyptic number.

It is an amenable number.

664252893 is a deficient number, since it is larger than the sum of its proper divisors (330760035).

664252893 is an equidigital number, since it uses as much as digits as its factorization.

664252893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733566 (or 2733554 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 664252893 is about 25773.1040621808. The cubic root of 664252893 is about 872.5248769737.

The spelling of 664252893 in words is "six hundred sixty-four million, two hundred fifty-two thousand, eight hundred ninety-three".