166710289 has 4 divisors (see below), whose sum is σ = 167829300. Its totient is φ = 165591280.

The previous prime is 166710287. The next prime is 166710301. The reversal of 166710289 is 982017661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10660225 + 156050064 = 3265^2 + 12492^2 .

It is a cyclic number.

It is not a de Polignac number, because 166710289 - 2¹ = 166710287 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166710283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559282 + ... + 559579.

It is an arithmetic number, because the mean of its divisors is an integer number (41957325).

Almost surely, 2^166710289 is an apocalyptic number.

It is an amenable number.

166710289 is a deficient number, since it is larger than the sum of its proper divisors (1119011).

166710289 is a wasteful number, since it uses less digits than its factorization.

166710289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119010.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 166710289 is about 12911.6338625288. The cubic root of 166710289 is about 550.3692165512.

The spelling of 166710289 in words is "one hundred sixty-six million, seven hundred ten thousand, two hundred eighty-nine".