166166254244166 has 32 divisors (see below), whose sum is σ = 362547261230976. Its totient is φ = 50353034472000.

The previous prime is 166166254244143. The next prime is 166166254244171. The reversal of 166166254244166 is 661442452661661.

It is a super-2 number, since 2×166166254244166² (a number of 29 digits) contains 22 as substring.

It is a congruent 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, 425380 + ... + 18234951.

It is an arithmetic number, because the mean of its divisors is an integer number (11329601913468).

Almost surely, 2^{166166254244166} is an apocalyptic number.

166166254244166 is an abundant number, since it is smaller than the sum of its proper divisors (196381006986810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166166254244166 is a wasteful number, since it uses less digits than its factorization.

166166254244166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18795268.

The product of its digits is 59719680, while the sum is 60.

The spelling of 166166254244166 in words is "one hundred sixty-six trillion, one hundred sixty-six billion, two hundred fifty-four million, two hundred forty-four thousand, one hundred sixty-six".