866654868889 has 8 divisors (see below), whose sum is σ = 867989952000. Its totient is φ = 865320147552.

The previous prime is 866654868853. The next prime is 866654868901. The reversal of 866654868889 is 988868456668.

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

It is a cyclic number.

It is not a de Polignac number, because 866654868889 - 2⁹ = 866654868377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866654868389) 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, 4916917 + ... + 5090125.

It is an arithmetic number, because the mean of its divisors is an integer number (108498744000).

Almost surely, 2^866654868889 is an apocalyptic number.

It is an amenable number.

866654868889 is a deficient number, since it is larger than the sum of its proper divisors (1335083111).

866654868889 is a wasteful number, since it uses less digits than its factorization.

866654868889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180887.

The product of its digits is 7644119040, while the sum is 82.

The spelling of 866654868889 in words is "eight hundred sixty-six billion, six hundred fifty-four million, eight hundred sixty-eight thousand, eight hundred eighty-nine".