85665163 has 8 divisors (see below), whose sum is σ = 86670000. Its totient is φ = 84664320.

The previous prime is 85665127. The next prime is 85665197. The reversal of 85665163 is 36156658.

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

It is a cyclic number.

It is not a de Polignac number, because 85665163 - 2²⁵ = 52110731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85665103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67963 + ... + 69211.

It is an arithmetic number, because the mean of its divisors is an integer number (10833750).

Almost surely, 2^85665163 is an apocalyptic number.

85665163 is a deficient number, since it is larger than the sum of its proper divisors (1004837).

85665163 is a wasteful number, since it uses less digits than its factorization.

85665163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997.

The product of its digits is 129600, while the sum is 40.

The square root of 85665163 is about 9255.5476877384. The cubic root of 85665163 is about 440.8268937333.

The spelling of 85665163 in words is "eighty-five million, six hundred sixty-five thousand, one hundred sixty-three".