166682149 has 2 divisors, whose sum is σ = 166682150. Its totient is φ = 166682148.

The previous prime is 166682123. The next prime is 166682167. The reversal of 166682149 is 941286661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121550625 + 45131524 = 11025^2 + 6718^2 .

It is a cyclic number.

It is not a de Polignac number, because 166682149 - 2²⁵ = 133127717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166622149) 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 as a sum of consecutive naturals, namely, 83341074 + 83341075.

It is an arithmetic number, because the mean of its divisors is an integer number (83341075).

Almost surely, 2^166682149 is an apocalyptic number.

It is an amenable number.

166682149 is a deficient number, since it is larger than the sum of its proper divisors (1).

166682149 is an equidigital number, since it uses as much as digits as its factorization.

166682149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 43.

The square root of 166682149 is about 12910.5441016248. The cubic root of 166682149 is about 550.3382481342.

The spelling of 166682149 in words is "one hundred sixty-six million, six hundred eighty-two thousand, one hundred forty-nine".