664716633 has 8 divisors (see below), whose sum is σ = 1012901568. Its totient is φ = 379838064.

The previous prime is 664716631. The next prime is 664716667. The reversal of 664716633 is 336617466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664716633 - 2¹ = 664716631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664716631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15826566 + ... + 15826607.

It is an arithmetic number, because the mean of its divisors is an integer number (126612696).

Almost surely, 2^664716633 is an apocalyptic number.

It is an amenable number.

664716633 is a deficient number, since it is larger than the sum of its proper divisors (348184935).

664716633 is a wasteful number, since it uses less digits than its factorization.

664716633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31653183.

The product of its digits is 326592, while the sum is 42.

The square root of 664716633 is about 25782.0990805636. The cubic root of 664716633 is about 872.7278772496.

The spelling of 664716633 in words is "six hundred sixty-four million, seven hundred sixteen thousand, six hundred thirty-three".