663925238 has 8 divisors (see below), whose sum is σ = 997331160. Its totient is φ = 331481520.

The previous prime is 663925219. The next prime is 663925253. The reversal of 663925238 is 832529366.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 238823 + ... + 241586.

It is an arithmetic number, because the mean of its divisors is an integer number (124666395).

Almost surely, 2^663925238 is an apocalyptic number.

663925238 is a deficient number, since it is larger than the sum of its proper divisors (333405922).

663925238 is a wasteful number, since it uses less digits than its factorization.

663925238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481102.

The product of its digits is 466560, while the sum is 44.

The square root of 663925238 is about 25766.7467484741. The cubic root of 663925238 is about 872.3813903785.

The spelling of 663925238 in words is "six hundred sixty-three million, nine hundred twenty-five thousand, two hundred thirty-eight".