866666166 has 8 divisors (see below), whose sum is σ = 1733332344. Its totient is φ = 288888720.

The previous prime is 866666113. The next prime is 866666183. The reversal of 866666166 is 661666668.

866666166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

866666166 is an admirable number.

It is a super-2 number, since 2×866666166² = 1502220486578279112, which contains 22 as substring.

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, 72222175 + ... + 72222186.

It is an arithmetic number, because the mean of its divisors is an integer number (216666543).

Almost surely, 2^866666166 is an apocalyptic number.

866666166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

866666166 is a wasteful number, since it uses less digits than its factorization.

866666166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144444366.

The product of its digits is 2239488, while the sum is 51.

The square root of 866666166 is about 29439.1943843577. The cubic root of 866666166 is about 953.4193184000.

The spelling of 866666166 in words is "eight hundred sixty-six million, six hundred sixty-six thousand, one hundred sixty-six".