166000949 has 2 divisors, whose sum is σ = 166000950. Its totient is φ = 166000948.

The previous prime is 166000921. The next prime is 166000951. The reversal of 166000949 is 949000661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155176849 + 10824100 = 12457^2 + 3290^2 .

It is a cyclic number.

It is not a de Polignac number, because 166000949 - 2²⁰ = 164952373 is a prime.

It is a Sophie Germain prime.

Together with 166000951, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166000969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83000474 + 83000475.

It is an arithmetic number, because the mean of its divisors is an integer number (83000475).

Almost surely, 2^166000949 is an apocalyptic number.

It is an amenable number.

166000949 is a deficient number, since it is larger than the sum of its proper divisors (1).

166000949 is an equidigital number, since it uses as much as digits as its factorization.

166000949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 166000949 is about 12884.1355550149. The cubic root of 166000949 is about 549.5875133118.

The spelling of 166000949 in words is "one hundred sixty-six million, nine hundred forty-nine", and thus it is an aban number.