166050909 has 6 divisors (see below), whose sum is σ = 239851326. Its totient is φ = 110700600.

The previous prime is 166050889. The next prime is 166050923. The reversal of 166050909 is 909050661.

It can be written as a sum of positive squares in only one way, i.e., 134444025 + 31606884 = 11595^2 + 5622^2 .

It is not a de Polignac number, because 166050909 - 2⁹ = 166050397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166050959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9225042 + ... + 9225059.

It is an arithmetic number, because the mean of its divisors is an integer number (39975221).

Almost surely, 2^166050909 is an apocalyptic number.

It is an amenable number.

166050909 is a deficient number, since it is larger than the sum of its proper divisors (73800417).

166050909 is a wasteful number, since it uses less digits than its factorization.

166050909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18450107 (or 18450104 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 166050909 is about 12886.0742276304. The cubic root of 166050909 is about 549.6426427920.

The spelling of 166050909 in words is "one hundred sixty-six million, fifty thousand, nine hundred nine".