866800082636783 has 2 divisors, whose sum is σ = 866800082636784. Its totient is φ = 866800082636782.

The previous prime is 866800082636759. The next prime is 866800082636797. The reversal of 866800082636783 is 387636280008668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866800082636783 - 2⁴⁰ = 865700571009007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866800082633783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433400041318391 + 433400041318392.

It is an arithmetic number, because the mean of its divisors is an integer number (433400041318392).

Almost surely, 2^{866800082636783} is an apocalyptic number.

866800082636783 is a deficient number, since it is larger than the sum of its proper divisors (1).

866800082636783 is an equidigital number, since it uses as much as digits as its factorization.

866800082636783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 668860416, while the sum is 71.

The spelling of 866800082636783 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-two million, six hundred thirty-six thousand, seven hundred eighty-three".