866443613144164 has 12 divisors (see below), whose sum is σ = 1654119625093488. Its totient is φ = 393838005974600.

The previous prime is 866443613144047. The next prime is 866443613144201. The reversal of 866443613144164 is 461441316344668.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9845950149322 + ... + 9845950149409.

It is an arithmetic number, because the mean of its divisors is an integer number (137843302091124).

Almost surely, 2^{866443613144164} is an apocalyptic number.

It is an amenable number.

866443613144164 is a deficient number, since it is larger than the sum of its proper divisors (787676011949324).

866443613144164 is a wasteful number, since it uses less digits than its factorization.

866443613144164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19691900298746 (or 19691900298744 counting only the distinct ones).

The product of its digits is 95551488, while the sum is 61.

The spelling of 866443613144164 in words is "eight hundred sixty-six trillion, four hundred forty-three billion, six hundred thirteen million, one hundred forty-four thousand, one hundred sixty-four".