166461089 has 2 divisors, whose sum is σ = 166461090. Its totient is φ = 166461088.

The previous prime is 166461079. The next prime is 166461101. The reversal of 166461089 is 980164661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160782400 + 5678689 = 12680^2 + 2383^2 .

It is a cyclic number.

It is not a de Polignac number, because 166461089 - 2¹² = 166456993 is a prime.

It is not a weakly prime, because it can be changed into another prime (166461079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83230544 + 83230545.

It is an arithmetic number, because the mean of its divisors is an integer number (83230545).

Almost surely, 2^166461089 is an apocalyptic number.

It is an amenable number.

166461089 is a deficient number, since it is larger than the sum of its proper divisors (1).

166461089 is an equidigital number, since it uses as much as digits as its factorization.

166461089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 166461089 is about 12901.9800418385. The cubic root of 166461089 is about 550.0948475544.

The spelling of 166461089 in words is "one hundred sixty-six million, four hundred sixty-one thousand, eighty-nine".