866668959 has 24 divisors (see below), whose sum is σ = 1427458032. Its totient is φ = 501960960.

The previous prime is 866668951. The next prime is 866668961. The reversal of 866668959 is 959866668.

It is not a de Polignac number, because 866668959 - 2³ = 866668951 is a prime.

It is a super-2 number, since 2×866668959² = 1502230168988287362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 866668896 and 866668905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866668951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215877 + ... + 219854.

It is an arithmetic number, because the mean of its divisors is an integer number (59477418).

Almost surely, 2^866668959 is an apocalyptic number.

866668959 is a deficient number, since it is larger than the sum of its proper divisors (560789073).

866668959 is a wasteful number, since it uses less digits than its factorization.

866668959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435767 (or 435764 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 63.

The square root of 866668959 is about 29439.2418210796. The cubic root of 866668959 is about 953.4203425919.

The spelling of 866668959 in words is "eight hundred sixty-six million, six hundred sixty-eight thousand, nine hundred fifty-nine".