136866 has 8 divisors (see below), whose sum is σ = 273744. Its totient is φ = 45620.

The previous prime is 136861. The next prime is 136879. The reversal of 136866 is 668631.

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

136866 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (136861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11400 + ... + 11411.

It is an arithmetic number, because the mean of its divisors is an integer number (34218).

2¹³⁶⁸⁶⁶ is an apocalyptic number.

136866 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.

136866 is a wasteful number, since it uses less digits than its factorization.

136866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22816.

The product of its digits is 5184, while the sum is 30.

The square root of 136866 is about 369.9540512010. The cubic root of 136866 is about 51.5345543702.

The spelling of 136866 in words is "one hundred thirty-six thousand, eight hundred sixty-six".