866503416443 has 16 divisors (see below), whose sum is σ = 992616307200. Its totient is φ = 740972606976.

The previous prime is 866503416403. The next prime is 866503416463. The reversal of 866503416443 is 344614305668.

It is not a de Polignac number, because 866503416443 - 2³⁸ = 591625509499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 866503416391 and 866503416400.

It is not an unprimeable number, because it can be changed into a prime (866503416403) 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, 44328530 + ... + 44348072.

It is an arithmetic number, because the mean of its divisors is an integer number (62038519200).

Almost surely, 2^866503416443 is an apocalyptic number.

866503416443 is a deficient number, since it is larger than the sum of its proper divisors (126112890757).

866503416443 is a wasteful number, since it uses less digits than its factorization.

866503416443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34106.

The product of its (nonzero) digits is 4976640, while the sum is 50.

The spelling of 866503416443 in words is "eight hundred sixty-six billion, five hundred three million, four hundred sixteen thousand, four hundred forty-three".