166194589 has 12 divisors (see below), whose sum is σ = 184367260. Its totient is φ = 149688000.

The previous prime is 166194571. The next prime is 166194617. The reversal of 166194589 is 985491661.

It can be written as a sum of positive squares in 2 ways, for example, as 86806489 + 79388100 = 9317^2 + 8910^2 .

It is not a de Polignac number, because 166194589 - 2¹¹ = 166192541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166192589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6889 + ... + 19489.

Almost surely, 2^166194589 is an apocalyptic number.

It is an amenable number.

166194589 is a deficient number, since it is larger than the sum of its proper divisors (18172671).

166194589 is a wasteful number, since it uses less digits than its factorization.

166194589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12732 (or 12721 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

The square root of 166194589 is about 12891.6480327381. The cubic root of 166194589 is about 549.8011280995.

The spelling of 166194589 in words is "one hundred sixty-six million, one hundred ninety-four thousand, five hundred eighty-nine".