866106918588 has 12 divisors (see below), whose sum is σ = 2020916143400. Its totient is φ = 288702306192.

The previous prime is 866106918563. The next prime is 866106918619. The reversal of 866106918588 is 885819601668.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 36087788263 + ... + 36087788286.

Almost surely, 2^866106918588 is an apocalyptic number.

It is an amenable number.

866106918588 is an abundant number, since it is smaller than the sum of its proper divisors (1154809224812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866106918588 is a wasteful number, since it uses less digits than its factorization.

866106918588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72175576556 (or 72175576554 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 66.

The spelling of 866106918588 in words is "eight hundred sixty-six billion, one hundred six million, nine hundred eighteen thousand, five hundred eighty-eight".