865166163 has 8 divisors (see below), whose sum is σ = 1161854400. Its totient is φ = 572627688.

The previous prime is 865166161. The next prime is 865166201. The reversal of 865166163 is 361661568.

865166163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 865166163 - 2¹ = 865166161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (865166161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1036953 + ... + 1037786.

It is an arithmetic number, because the mean of its divisors is an integer number (145231800).

Almost surely, 2^865166163 is an apocalyptic number.

865166163 is a deficient number, since it is larger than the sum of its proper divisors (296688237).

865166163 is a wasteful number, since it uses less digits than its factorization.

865166163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074881.

The product of its digits is 155520, while the sum is 42.

The square root of 865166163 is about 29413.7070598046. The cubic root of 865166163 is about 952.8689497319.

The spelling of 865166163 in words is "eight hundred sixty-five million, one hundred sixty-six thousand, one hundred sixty-three".