866543011826441 has 16 divisors (see below), whose sum is σ = 901461141826560. Its totient is φ = 832341843041280.

The previous prime is 866543011826431. The next prime is 866543011826449. The reversal of 866543011826441 is 144628110345668.

It is a cyclic number.

It is not a de Polignac number, because 866543011826441 - 2⁶ = 866543011826377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866543011826449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377800145 + ... + 380086878.

It is an arithmetic number, because the mean of its divisors is an integer number (56341321364160).

Almost surely, 2^{866543011826441} is an apocalyptic number.

It is an amenable number.

866543011826441 is a deficient number, since it is larger than the sum of its proper divisors (34918130000119).

866543011826441 is a wasteful number, since it uses less digits than its factorization.

866543011826441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757887496.

The product of its (nonzero) digits is 26542080, while the sum is 59.

The spelling of 866543011826441 in words is "eight hundred sixty-six trillion, five hundred forty-three billion, eleven million, eight hundred twenty-six thousand, four hundred forty-one".