8866778834871 has 24 divisors (see below), whose sum is σ = 12865280912640. Its totient is φ = 5884607048976.

The previous prime is 8866778834861. The next prime is 8866778834929. The reversal of 8866778834871 is 1784388776688.

It is a happy number.

8866778834871 is a `hidden beast` number, since 8 + 8 + 6 + 67 + 78 + 8 + 3 + 487 + 1 = 666.

It is not a de Polignac number, because 8866778834871 - 2⁷ = 8866778834743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8866778834831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 524481 + ... + 4243658.

It is an arithmetic number, because the mean of its divisors is an integer number (536053371360).

Almost surely, 2^{8866778834871} is an apocalyptic number.

8866778834871 is a deficient number, since it is larger than the sum of its proper divisors (3998502077769).

8866778834871 is a wasteful number, since it uses less digits than its factorization.

8866778834871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4769075 (or 4769072 counting only the distinct ones).

The product of its digits is 4855431168, while the sum is 81.

The spelling of 8866778834871 in words is "eight trillion, eight hundred sixty-six billion, seven hundred seventy-eight million, eight hundred thirty-four thousand, eight hundred seventy-one".