166217383918 has 8 divisors (see below), whose sum is σ = 249328310400. Its totient is φ = 83107947120.

The previous prime is 166217383909. The next prime is 166217383919. The reversal of 166217383918 is 819383712661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166217383919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30798 + ... + 577393.

It is an arithmetic number, because the mean of its divisors is an integer number (31166038800).

Almost surely, 2^166217383918 is an apocalyptic number.

166217383918 is a deficient number, since it is larger than the sum of its proper divisors (83110926482).

166217383918 is a wasteful number, since it uses less digits than its factorization.

166217383918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744842.

The product of its digits is 2612736, while the sum is 55.

The spelling of 166217383918 in words is "one hundred sixty-six billion, two hundred seventeen million, three hundred eighty-three thousand, nine hundred eighteen".