866827820573443 has 2 divisors, whose sum is σ = 866827820573444. Its totient is φ = 866827820573442.

The previous prime is 866827820573329. The next prime is 866827820573471. The reversal of 866827820573443 is 344375028728668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866827820573443 - 2⁴¹ = 864628797317891 is a prime.

It is not a weakly prime, because it can be changed into another prime (866827820573243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433413910286721 + 433413910286722.

It is an arithmetic number, because the mean of its divisors is an integer number (433413910286722).

Almost surely, 2^{866827820573443} is an apocalyptic number.

866827820573443 is a deficient number, since it is larger than the sum of its proper divisors (1).

866827820573443 is an equidigital number, since it uses as much as digits as its factorization.

866827820573443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2601123840, while the sum is 73.

The spelling of 866827820573443 in words is "eight hundred sixty-six trillion, eight hundred twenty-seven billion, eight hundred twenty million, five hundred seventy-three thousand, four hundred forty-three".