166851868733 has 16 divisors (see below), whose sum is σ = 184962080256. Its totient is φ = 149237486640.

The previous prime is 166851868727. The next prime is 166851868763. The reversal of 166851868733 is 337868158661.

It is not a de Polignac number, because 166851868733 - 2⁴ = 166851868717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166851868723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469010 + ... + 744092.

It is an arithmetic number, because the mean of its divisors is an integer number (11560130016).

Almost surely, 2^166851868733 is an apocalyptic number.

It is an amenable number.

166851868733 is a deficient number, since it is larger than the sum of its proper divisors (18110211523).

166851868733 is a wasteful number, since it uses less digits than its factorization.

166851868733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275984.

The product of its digits is 34836480, while the sum is 62.

The spelling of 166851868733 in words is "one hundred sixty-six billion, eight hundred fifty-one million, eight hundred sixty-eight thousand, seven hundred thirty-three".