166150261 has 2 divisors, whose sum is σ = 166150262. Its totient is φ = 166150260.

The previous prime is 166150253. The next prime is 166150267. The reversal of 166150261 is 162051661.

166150261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156725361 + 9424900 = 12519^2 + 3070^2 .

It is a cyclic number.

It is not a de Polignac number, because 166150261 - 2³ = 166150253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166150267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83075130 + 83075131.

It is an arithmetic number, because the mean of its divisors is an integer number (83075131).

Almost surely, 2^166150261 is an apocalyptic number.

It is an amenable number.

166150261 is a deficient number, since it is larger than the sum of its proper divisors (1).

166150261 is an equidigital number, since it uses as much as digits as its factorization.

166150261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 166150261 is about 12889.9286654349. The cubic root of 166150261 is about 549.7522421286.

The spelling of 166150261 in words is "one hundred sixty-six million, one hundred fifty thousand, two hundred sixty-one".