8816666161 has 2 divisors, whose sum is σ = 8816666162. Its totient is φ = 8816666160.

The previous prime is 8816666149. The next prime is 8816666219. The reversal of 8816666161 is 1616666188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7524695025 + 1291971136 = 86745^2 + 35944^2 .

It is a cyclic number.

It is not a de Polignac number, because 8816666161 - 2¹⁷ = 8816535089 is a prime.

It is not a weakly prime, because it can be changed into another prime (8816663161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4408333080 + 4408333081.

It is an arithmetic number, because the mean of its divisors is an integer number (4408333081).

Almost surely, 2^8816666161 is an apocalyptic number.

It is an amenable number.

8816666161 is a deficient number, since it is larger than the sum of its proper divisors (1).

8816666161 is an equidigital number, since it uses as much as digits as its factorization.

8816666161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 49.

The square root of 8816666161 is about 93897.1041140247. The cubic root of 8816666161 is about 2065.8627534233.

The spelling of 8816666161 in words is "eight billion, eight hundred sixteen million, six hundred sixty-six thousand, one hundred sixty-one".