866807364321771 has 8 divisors (see below), whose sum is σ = 1159435622565840. Its totient is φ = 576025341146112.

The previous prime is 866807364321749. The next prime is 866807364321779. The reversal of 866807364321771 is 177123463708668.

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

It is not a de Polignac number, because 866807364321771 - 2²⁶ = 866807297212907 is a prime.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 866807364321696 and 866807364321705.

It is not an unprimeable number, because it can be changed into a prime (866807364321779) 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, 461558766006 + ... + 461558767883.

It is an arithmetic number, because the mean of its divisors is an integer number (144929452820730).

Almost surely, 2^{866807364321771} is an apocalyptic number.

866807364321771 is a deficient number, since it is larger than the sum of its proper divisors (292628258244069).

866807364321771 is a wasteful number, since it uses less digits than its factorization.

866807364321771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923117534205.

The product of its (nonzero) digits is 341397504, while the sum is 69.

The spelling of 866807364321771 in words is "eight hundred sixty-six trillion, eight hundred seven billion, three hundred sixty-four million, three hundred twenty-one thousand, seven hundred seventy-one".