1666668500018 has 8 divisors (see below), whose sum is σ = 2537316224112. Its totient is φ = 820896425316.

The previous prime is 1666668499961. The next prime is 1666668500033. The reversal of 1666668500018 is 8100058666661.

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, 6218912180 + ... + 6218912447.

It is an arithmetic number, because the mean of its divisors is an integer number (317164528014).

Almost surely, 2^{1666668500018} is an apocalyptic number.

1666668500018 is a deficient number, since it is larger than the sum of its proper divisors (870647724094).

1666668500018 is a wasteful number, since it uses less digits than its factorization.

1666668500018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12437824696.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 1666668500018 in words is "one trillion, six hundred sixty-six billion, six hundred sixty-eight million, five hundred thousand, eighteen".