166141589 has 2 divisors, whose sum is σ = 166141590. Its totient is φ = 166141588.

The previous prime is 166141583. The next prime is 166141687. The reversal of 166141589 is 985141661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162358564 + 3783025 = 12742^2 + 1945^2 .

It is a cyclic number.

It is not a de Polignac number, because 166141589 - 2⁸ = 166141333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166141583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83070794 + 83070795.

It is an arithmetic number, because the mean of its divisors is an integer number (83070795).

Almost surely, 2^166141589 is an apocalyptic number.

It is an amenable number.

166141589 is a deficient number, since it is larger than the sum of its proper divisors (1).

166141589 is an equidigital number, since it uses as much as digits as its factorization.

166141589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 41.

The square root of 166141589 is about 12889.5922743894. The cubic root of 166141589 is about 549.7426774242.

The spelling of 166141589 in words is "one hundred sixty-six million, one hundred forty-one thousand, five hundred eighty-nine".