166206901189 has 16 divisors (see below), whose sum is σ = 190310291712. Its totient is φ = 142193662848.

The previous prime is 166206901177. The next prime is 166206901193. The reversal of 166206901189 is 981109602661.

It is a cyclic number.

It is not a de Polignac number, because 166206901189 - 2³³ = 157616966597 is a prime.

It is a super-2 number, since 2×166206901189² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166206901489) 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, 8336697 + ... + 8356609.

It is an arithmetic number, because the mean of its divisors is an integer number (11894393232).

Almost surely, 2^166206901189 is an apocalyptic number.

It is an amenable number.

166206901189 is a deficient number, since it is larger than the sum of its proper divisors (24103390523).

166206901189 is a wasteful number, since it uses less digits than its factorization.

166206901189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22116.

The product of its (nonzero) digits is 279936, while the sum is 49.

The spelling of 166206901189 in words is "one hundred sixty-six billion, two hundred six million, nine hundred one thousand, one hundred eighty-nine".