166741289 has 16 divisors (see below), whose sum is σ = 200067840. Its totient is φ = 136940160.

The previous prime is 166741279. The next prime is 166741303. The reversal of 166741289 is 982147661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166741289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166741249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5684 + ... + 19125.

It is an arithmetic number, because the mean of its divisors is an integer number (12504240).

Almost surely, 2^166741289 is an apocalyptic number.

It is an amenable number.

166741289 is a deficient number, since it is larger than the sum of its proper divisors (33326551).

166741289 is a wasteful number, since it uses less digits than its factorization.

166741289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24880.

The product of its digits is 145152, while the sum is 44.

The square root of 166741289 is about 12912.8342744728. The cubic root of 166741289 is about 550.4033283996.

The spelling of 166741289 in words is "one hundred sixty-six million, seven hundred forty-one thousand, two hundred eighty-nine".