866158222863167 has 4 divisors (see below), whose sum is σ = 932785778468040. Its totient is φ = 799530667258296.

The previous prime is 866158222863139. The next prime is 866158222863179. The reversal of 866158222863167 is 761368222851668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 866158222863167 - 2²² = 866158218668863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 866158222863167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866158222863137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33313777802417 + ... + 33313777802442.

It is an arithmetic number, because the mean of its divisors is an integer number (233196444617010).

Almost surely, 2^{866158222863167} is an apocalyptic number.

866158222863167 is a deficient number, since it is larger than the sum of its proper divisors (66627555604873).

866158222863167 is a wasteful number, since it uses less digits than its factorization.

866158222863167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66627555604872.

The product of its digits is 557383680, while the sum is 71.

The spelling of 866158222863167 in words is "eight hundred sixty-six trillion, one hundred fifty-eight billion, two hundred twenty-two million, eight hundred sixty-three thousand, one hundred sixty-seven".