866786517712271 has 8 divisors (see below), whose sum is σ = 933771599626320. Its totient is φ = 799845606646272.

The previous prime is 866786517712259. The next prime is 866786517712327. The reversal of 866786517712271 is 172217715687668.

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 866786517712271 - 2⁴² = 862388471201167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866786517732271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11042671250 + ... + 11042749743.

It is an arithmetic number, because the mean of its divisors is an integer number (116721449953290).

Almost surely, 2^{866786517712271} is an apocalyptic number.

866786517712271 is a deficient number, since it is larger than the sum of its proper divisors (66985081914049).

866786517712271 is a wasteful number, since it uses less digits than its factorization.

866786517712271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22085424025.

The product of its digits is 663828480, while the sum is 74.

The spelling of 866786517712271 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred seventeen million, seven hundred twelve thousand, two hundred seventy-one".