166668350185 has 16 divisors (see below), whose sum is σ = 207441240912. Its totient is φ = 128446560000.

The previous prime is 166668350171. The next prime is 166668350221. The reversal of 166668350185 is 581053866661.

It can be written as a sum of positive squares in 8 ways, for example, as 53495989264 + 113172360921 = 231292^2 + 336411^2 .

It is not a de Polignac number, because 166668350185 - 2⁵ = 166668350153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4441266 + ... + 4478635.

It is an arithmetic number, because the mean of its divisors is an integer number (12965077557).

Almost surely, 2^166668350185 is an apocalyptic number.

It is an amenable number.

166668350185 is a deficient number, since it is larger than the sum of its proper divisors (40772890727).

166668350185 is a wasteful number, since it uses less digits than its factorization.

166668350185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8920044.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 166668350185 in words is "one hundred sixty-six billion, six hundred sixty-eight million, three hundred fifty thousand, one hundred eighty-five".