866441530022047 has 4 divisors (see below), whose sum is σ = 990218891453776. Its totient is φ = 742664168590320.

The previous prime is 866441530022023. The next prime is 866441530022051. The reversal of 866441530022047 is 740220035144668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866441530022047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866441530021985 and 866441530022003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866441530022647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61888680715854 + ... + 61888680715867.

It is an arithmetic number, because the mean of its divisors is an integer number (247554722863444).

Almost surely, 2^{866441530022047} is an apocalyptic number.

866441530022047 is a deficient number, since it is larger than the sum of its proper divisors (123777361431729).

866441530022047 is a wasteful number, since it uses less digits than its factorization.

866441530022047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123777361431728.

The product of its (nonzero) digits is 7741440, while the sum is 52.

The spelling of 866441530022047 in words is "eight hundred sixty-six trillion, four hundred forty-one billion, five hundred thirty million, twenty-two thousand, forty-seven".