866441575211181 has 8 divisors (see below), whose sum is σ = 1155265100450880. Its totient is φ = 577622883389472.

The previous prime is 866441575211131. The next prime is 866441575211213. The reversal of 866441575211181 is 181112575144668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 866441575211181 - 2²² = 866441571016877 is a prime.

It is a super-2 number, since 2×866441575211181² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866441575211131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207936201 + ... + 1208653278.

It is an arithmetic number, because the mean of its divisors is an integer number (144408137556360).

Almost surely, 2^{866441575211181} is an apocalyptic number.

It is an amenable number.

866441575211181 is a deficient number, since it is larger than the sum of its proper divisors (288823525239699).

866441575211181 is a wasteful number, since it uses less digits than its factorization.

866441575211181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416708995.

The product of its digits is 12902400, while the sum is 60.

The spelling of 866441575211181 in words is "eight hundred sixty-six trillion, four hundred forty-one billion, five hundred seventy-five million, two hundred eleven thousand, one hundred eighty-one".