866181545846443 has 2 divisors, whose sum is σ = 866181545846444. Its totient is φ = 866181545846442.

The previous prime is 866181545846431. The next prime is 866181545846627. The reversal of 866181545846443 is 344648545181668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866181545846443 - 2¹³ = 866181545838251 is a prime.

It is not a weakly prime, because it can be changed into another prime (866181545846843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433090772923221 + 433090772923222.

It is an arithmetic number, because the mean of its divisors is an integer number (433090772923222).

Almost surely, 2^{866181545846443} is an apocalyptic number.

866181545846443 is a deficient number, since it is larger than the sum of its proper divisors (1).

866181545846443 is an equidigital number, since it uses as much as digits as its factorization.

866181545846443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2123366400, while the sum is 73.

The spelling of 866181545846443 in words is "eight hundred sixty-six trillion, one hundred eighty-one billion, five hundred forty-five million, eight hundred forty-six thousand, four hundred forty-three".