663372857 has 8 divisors (see below), whose sum is σ = 772445376. Its totient is φ = 557876592.

The previous prime is 663372847. The next prime is 663372869. The reversal of 663372857 is 758273366.

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

It is not a de Polignac number, because 663372857 - 2⁴ = 663372841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663372847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893663 + ... + 894404.

It is an arithmetic number, because the mean of its divisors is an integer number (96555672).

Almost surely, 2^663372857 is an apocalyptic number.

It is an amenable number.

663372857 is a deficient number, since it is larger than the sum of its proper divisors (109072519).

663372857 is a wasteful number, since it uses less digits than its factorization.

663372857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788127.

The product of its digits is 1270080, while the sum is 47.

The square root of 663372857 is about 25756.0256444973. The cubic root of 663372857 is about 872.1393849131.

The spelling of 663372857 in words is "six hundred sixty-three million, three hundred seventy-two thousand, eight hundred fifty-seven".