866788807408471 has 8 divisors (see below), whose sum is σ = 895173587877888. Its totient is φ = 838430517639000.

The previous prime is 866788807408439. The next prime is 866788807408499. The reversal of 866788807408471 is 174804708887668.

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 866788807408471 - 2⁵ = 866788807408439 is a prime.

It is a super-3 number, since 3×866788807408471³ (a number of 46 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866788807408411) 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, 6622608475 + ... + 6622739356.

It is an arithmetic number, because the mean of its divisors is an integer number (111896698484736).

Almost surely, 2^{866788807408471} is an apocalyptic number.

866788807408471 is a deficient number, since it is larger than the sum of its proper divisors (28384780469417).

866788807408471 is a wasteful number, since it uses less digits than its factorization.

866788807408471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13245349973.

The product of its (nonzero) digits is 6473908224, while the sum is 82.

The spelling of 866788807408471 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, eight hundred seven million, four hundred eight thousand, four hundred seventy-one".