166662149 has 2 divisors, whose sum is σ = 166662150. Its totient is φ = 166662148.

The previous prime is 166662143. The next prime is 166662151. The reversal of 166662149 is 941266661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132940900 + 33721249 = 11530^2 + 5807^2 .

It is a cyclic number.

It is not a de Polignac number, because 166662149 - 2⁸ = 166661893 is a prime.

Together with 166662151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166662143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83331074 + 83331075.

It is an arithmetic number, because the mean of its divisors is an integer number (83331075).

Almost surely, 2^166662149 is an apocalyptic number.

It is an amenable number.

166662149 is a deficient number, since it is larger than the sum of its proper divisors (1).

166662149 is an equidigital number, since it uses as much as digits as its factorization.

166662149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 166662149 is about 12909.7695176947. The cubic root of 166662149 is about 550.3162357686.

The spelling of 166662149 in words is "one hundred sixty-six million, six hundred sixty-two thousand, one hundred forty-nine".