166376149 has 2 divisors, whose sum is σ = 166376150. Its totient is φ = 166376148.

The previous prime is 166376143. The next prime is 166376173. The reversal of 166376149 is 941673661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163200625 + 3175524 = 12775^2 + 1782^2 .

It is an emirp because it is prime and its reverse (941673661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166376149 - 2⁵ = 166376117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166376143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83188074 + 83188075.

It is an arithmetic number, because the mean of its divisors is an integer number (83188075).

Almost surely, 2^166376149 is an apocalyptic number.

It is an amenable number.

166376149 is a deficient number, since it is larger than the sum of its proper divisors (1).

166376149 is an equidigital number, since it uses as much as digits as its factorization.

166376149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 166376149 is about 12898.6878790054. The cubic root of 166376149 is about 550.0012661128.

The spelling of 166376149 in words is "one hundred sixty-six million, three hundred seventy-six thousand, one hundred forty-nine".