166666685185 has 64 divisors (see below), whose sum is σ = 275789412864. Its totient is φ = 93312000000.

The previous prime is 166666685149. The next prime is 166666685209. The reversal of 166666685185 is 581586666661.

It is not a de Polignac number, because 166666685185 - 2²⁹ = 166129814273 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 264816 + ... + 635185.

It is an arithmetic number, because the mean of its divisors is an integer number (4309209576).

Almost surely, 2^166666685185 is an apocalyptic number.

It is an amenable number.

166666685185 is a deficient number, since it is larger than the sum of its proper divisors (109122727679).

166666685185 is a wasteful number, since it uses less digits than its factorization.

166666685185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900074.

The product of its digits is 74649600, while the sum is 64.

The spelling of 166666685185 in words is "one hundred sixty-six billion, six hundred sixty-six million, six hundred eighty-five thousand, one hundred eighty-five".