866446722734823 has 80 divisors (see below), whose sum is σ = 1370961459806400. Its totient is φ = 543453257677824.

The previous prime is 866446722734753. The next prime is 866446722734903. The reversal of 866446722734823 is 328437227644668.

866446722734823 is a `hidden beast` number, since 8 + 6 + 6 + 4 + 4 + 6 + 72 + 2 + 73 + 482 + 3 = 666.

It is not a de Polignac number, because 866446722734823 - 2¹⁶ = 866446722669287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866446722734123) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 77715190653 + ... + 77715201801.

It is an arithmetic number, because the mean of its divisors is an integer number (17137018247580).

Almost surely, 2^{866446722734823} is an apocalyptic number.

866446722734823 is a deficient number, since it is larger than the sum of its proper divisors (504514737071577).

866446722734823 is a wasteful number, since it uses less digits than its factorization.

866446722734823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26838 (or 26829 counting only the distinct ones).

The product of its digits is 3121348608, while the sum is 72.

The spelling of 866446722734823 in words is "eight hundred sixty-six trillion, four hundred forty-six billion, seven hundred twenty-two million, seven hundred thirty-four thousand, eight hundred twenty-three".