166493141 has 2 divisors, whose sum is σ = 166493142. Its totient is φ = 166493140.

The previous prime is 166493123. The next prime is 166493149. The reversal of 166493141 is 141394661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153016900 + 13476241 = 12370^2 + 3671^2 .

It is a cyclic number.

It is not a de Polignac number, because 166493141 - 2⁶ = 166493077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166493149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83246570 + 83246571.

It is an arithmetic number, because the mean of its divisors is an integer number (83246571).

Almost surely, 2^166493141 is an apocalyptic number.

It is an amenable number.

166493141 is a deficient number, since it is larger than the sum of its proper divisors (1).

166493141 is an equidigital number, since it uses as much as digits as its factorization.

166493141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 166493141 is about 12903.2221169753. Note that the first 3 decimals coincide. The cubic root of 166493141 is about 550.1301521185.

The spelling of 166493141 in words is "one hundred sixty-six million, four hundred ninety-three thousand, one hundred forty-one".