500731666 has 8 divisors (see below), whose sum is σ = 783753984. Its totient is φ = 239480340.

The previous prime is 500731657. The next prime is 500731687. The reversal of 500731666 is 666137005.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5442690 + ... + 5442781.

It is an arithmetic number, because the mean of its divisors is an integer number (97969248).

Almost surely, 2^500731666 is an apocalyptic number.

500731666 is a deficient number, since it is larger than the sum of its proper divisors (283022318).

500731666 is a wasteful number, since it uses less digits than its factorization.

500731666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10885496.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 500731666 is about 22377.0343432726. The cubic root of 500731666 is about 794.0874864209.

The spelling of 500731666 in words is "five hundred million, seven hundred thirty-one thousand, six hundred sixty-six".