166480209 has 12 divisors (see below), whose sum is σ = 274824576. Its totient is φ = 95131512.

The previous prime is 166480183. The next prime is 166480229. The reversal of 166480209 is 902084661.

166480209 is a `hidden beast` number, since 1 + 6 + 648 + 0 + 2 + 0 + 9 = 666.

It is not a de Polignac number, because 166480209 - 2⁵ = 166480177 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (166480229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1321209 + ... + 1321334.

It is an arithmetic number, because the mean of its divisors is an integer number (22902048).

Almost surely, 2^166480209 is an apocalyptic number.

It is an amenable number.

166480209 is a deficient number, since it is larger than the sum of its proper divisors (108344367).

166480209 is a wasteful number, since it uses less digits than its factorization.

166480209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642556 (or 2642553 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 166480209 is about 12902.7209921009. The cubic root of 166480209 is about 550.1159083538.

The spelling of 166480209 in words is "one hundred sixty-six million, four hundred eighty thousand, two hundred nine".