866181545846444 has 12 divisors (see below), whose sum is σ = 1516276904801568. Its totient is φ = 432959573046000.

The previous prime is 866181545846443. The next prime is 866181545846627. The reversal of 866181545846444 is 444648545181668.

It is not an unprimeable number, because it can be changed into a prime (866181545846443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32799954452 + ... + 32799980859.

It is an arithmetic number, because the mean of its divisors is an integer number (126356408733464).

Almost surely, 2^{866181545846444} is an apocalyptic number.

It is an amenable number.

866181545846444 is a deficient number, since it is larger than the sum of its proper divisors (650095358955124).

866181545846444 is a wasteful number, since it uses less digits than its factorization.

866181545846444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65599938616 (or 65599938614 counting only the distinct ones).

The product of its digits is 2831155200, while the sum is 74.

The spelling of 866181545846444 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-four".