866204424823 has 2 divisors, whose sum is σ = 866204424824. Its totient is φ = 866204424822.

The previous prime is 866204424809. The next prime is 866204424829. The reversal of 866204424823 is 328424402668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866204424823 - 2¹⁷ = 866204293751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866204424829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433102212411 + 433102212412.

It is an arithmetic number, because the mean of its divisors is an integer number (433102212412).

Almost surely, 2^866204424823 is an apocalyptic number.

866204424823 is a deficient number, since it is larger than the sum of its proper divisors (1).

866204424823 is an equidigital number, since it uses as much as digits as its factorization.

866204424823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3538944, while the sum is 49.

The spelling of 866204424823 in words is "eight hundred sixty-six billion, two hundred four million, four hundred twenty-four thousand, eight hundred twenty-three".