866786235086743 has 2 divisors, whose sum is σ = 866786235086744. Its totient is φ = 866786235086742.

The previous prime is 866786235086741. The next prime is 866786235086803. The reversal of 866786235086743 is 347680532687668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866786235086743 - 2¹ = 866786235086741 is a prime.

Together with 866786235086741, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866786235086741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433393117543371 + 433393117543372.

It is an arithmetic number, because the mean of its divisors is an integer number (433393117543372).

Almost surely, 2^{866786235086743} is an apocalyptic number.

866786235086743 is a deficient number, since it is larger than the sum of its proper divisors (1).

866786235086743 is an equidigital number, since it uses as much as digits as its factorization.

866786235086743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11705057280, while the sum is 79.

The spelling of 866786235086743 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred thirty-five million, eighty-six thousand, seven hundred forty-three".