166168 has 8 divisors (see below), whose sum is σ = 311580. Its totient is φ = 83080.

The previous prime is 166157. The next prime is 166169. The reversal of 166168 is 861661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×166168² = 55223608448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166169) by changing a digit.

166168 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10378 + ... + 10393.

2¹⁶⁶¹⁶⁸ is an apocalyptic number.

It is an amenable number.

166168 is a deficient number, since it is larger than the sum of its proper divisors (145412).

166168 is a wasteful number, since it uses less digits than its factorization.

166168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20777 (or 20773 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 166168 is about 407.6370935035. The cubic root of 166168 is about 54.9771806162.

The spelling of 166168 in words is "one hundred sixty-six thousand, one hundred sixty-eight".