166085863 has 2 divisors, whose sum is σ = 166085864. Its totient is φ = 166085862.

The previous prime is 166085851. The next prime is 166085891. The reversal of 166085863 is 368580661.

It is a weak prime.

It is an emirp because it is prime and its reverse (368580661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166085863 - 2²⁵ = 132531431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166085833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83042931 + 83042932.

It is an arithmetic number, because the mean of its divisors is an integer number (83042932).

Almost surely, 2^166085863 is an apocalyptic number.

166085863 is a deficient number, since it is larger than the sum of its proper divisors (1).

166085863 is an equidigital number, since it uses as much as digits as its factorization.

166085863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 166085863 is about 12887.4304265823. The cubic root of 166085863 is about 549.6812069913.

The spelling of 166085863 in words is "one hundred sixty-six million, eighty-five thousand, eight hundred sixty-three".