663325917 has 8 divisors (see below), whose sum is σ = 884757024. Its totient is φ = 442056048.

The previous prime is 663325913. The next prime is 663325939. The reversal of 663325917 is 719523366.

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

It is not a de Polignac number, because 663325917 - 2² = 663325913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663325913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30358 + ... + 47415.

It is an arithmetic number, because the mean of its divisors is an integer number (110594628).

Almost surely, 2^663325917 is an apocalyptic number.

It is an amenable number.

663325917 is a deficient number, since it is larger than the sum of its proper divisors (221431107).

663325917 is a wasteful number, since it uses less digits than its factorization.

663325917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80619.

The product of its digits is 204120, while the sum is 42.

The square root of 663325917 is about 25755.1143853022. The cubic root of 663325917 is about 872.1188136823.

The spelling of 663325917 in words is "six hundred sixty-three million, three hundred twenty-five thousand, nine hundred seventeen".