116666161 has 2 divisors, whose sum is σ = 116666162. Its totient is φ = 116666160.

The previous prime is 116666153. The next prime is 116666167. The reversal of 116666161 is 161666611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61074225 + 55591936 = 7815^2 + 7456^2 .

It is a cyclic number.

It is not a de Polignac number, because 116666161 - 2³ = 116666153 is a prime.

It is a super-2 number, since 2×116666161² = 27221986244955842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (116666167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58333080 + 58333081.

It is an arithmetic number, because the mean of its divisors is an integer number (58333081).

Almost surely, 2^116666161 is an apocalyptic number.

It is an amenable number.

116666161 is a deficient number, since it is larger than the sum of its proper divisors (1).

116666161 is an equidigital number, since it uses as much as digits as its factorization.

116666161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 116666161 is about 10801.2110895029. The cubic root of 116666161 is about 488.6316970009.

The spelling of 116666161 in words is "one hundred sixteen million, six hundred sixty-six thousand, one hundred sixty-one".