166668500185 has 16 divisors (see below), whose sum is σ = 221440704192. Its totient is φ = 119404296000.

The previous prime is 166668500171. The next prime is 166668500197. The reversal of 166668500185 is 581005866661.

It is not a de Polignac number, because 166668500185 - 2¹³ = 166668491993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22610766 + ... + 22618135.

It is an arithmetic number, because the mean of its divisors is an integer number (13840044012).

Almost surely, 2^166668500185 is an apocalyptic number.

It is an amenable number.

166668500185 is a deficient number, since it is larger than the sum of its proper divisors (54772204007).

166668500185 is a wasteful number, since it uses less digits than its factorization.

166668500185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45228984.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 166668500185 in words is "one hundred sixty-six billion, six hundred sixty-eight million, five hundred thousand, one hundred eighty-five".