866668120 has 16 divisors (see below), whose sum is σ = 1950003360. Its totient is φ = 346667232.

The previous prime is 866668091. The next prime is 866668123. The reversal of 866668120 is 21866668.

It is a super-2 number, since 2×866668120² = 1502227260448668800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866668123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10833312 + ... + 10833391.

It is an arithmetic number, because the mean of its divisors is an integer number (121875210).

Almost surely, 2^866668120 is an apocalyptic number.

It is an amenable number.

866668120 is an abundant number, since it is smaller than the sum of its proper divisors (1083335240).

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

866668120 is a wasteful number, since it uses less digits than its factorization.

866668120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21666714 (or 21666710 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 866668120 is about 29439.2275713885. The cubic root of 866668120 is about 953.4200349312.

The spelling of 866668120 in words is "eight hundred sixty-six million, six hundred sixty-eight thousand, one hundred twenty".