133867866 has 48 divisors (see below), whose sum is σ = 307121472. Its totient is φ = 38797440.

The previous prime is 133867847. The next prime is 133867883. The reversal of 133867866 is 668768331.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12690 + ... + 20706.

It is an arithmetic number, because the mean of its divisors is an integer number (6398364).

Almost surely, 2^133867866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133867866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153560736).

133867866 is an abundant number, since it is smaller than the sum of its proper divisors (173253606).

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

133867866 is a wasteful number, since it uses less digits than its factorization.

133867866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8067 (or 8056 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 133867866 is about 11570.1281756081. The cubic root of 133867866 is about 511.5547403550.

The spelling of 133867866 in words is "one hundred thirty-three million, eight hundred sixty-seven thousand, eight hundred sixty-six".