666613316666 has 8 divisors (see below), whose sum is σ = 1090821790944. Its totient is φ = 303006053020.

The previous prime is 666613316659. The next prime is 666613316693.

666613316666 is nontrivially palindromic in base 10.

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, 15150302630 + ... + 15150302673.

It is an arithmetic number, because the mean of its divisors is an integer number (136352723868).

Almost surely, 2^666613316666 is an apocalyptic number.

666613316666 is a deficient number, since it is larger than the sum of its proper divisors (424208474278).

666613316666 is a wasteful number, since it uses less digits than its factorization.

666613316666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30300605316.

The product of its digits is 15116544, while the sum is 56.

The spelling of 666613316666 in words is "six hundred sixty-six billion, six hundred thirteen million, three hundred sixteen thousand, six hundred sixty-six".