166169 has 2 divisors, whose sum is σ = 166170. Its totient is φ = 166168.

The previous prime is 166157. The next prime is 166183. The reversal of 166169 is 961661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150544 + 15625 = 388^2 + 125^2 .

It is an emirp because it is prime and its reverse (961661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166169 is a prime.

It is a super-2 number, since 2×166169² = 55224273122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83084 + 83085.

It is an arithmetic number, because the mean of its divisors is an integer number (83085).

2¹⁶⁶¹⁶⁹ is an apocalyptic number.

It is an amenable number.

166169 is a deficient number, since it is larger than the sum of its proper divisors (1).

166169 is an equidigital number, since it uses as much as digits as its factorization.

166169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 166169 is about 407.6383200829. The cubic root of 166169 is about 54.9772909004.

The spelling of 166169 in words is "one hundred sixty-six thousand, one hundred sixty-nine".