136566 has 24 divisors (see below), whose sum is σ = 307944. Its totient is φ = 45360.

The previous prime is 136559. The next prime is 136573. The reversal of 136566 is 665631.

136566 is a `hidden beast` number, since 1 + 3 + 656 + 6 = 666.

136566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (136559) and next prime (136573).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346 + ... + 626.

It is an arithmetic number, because the mean of its divisors is an integer number (12831).

2¹³⁶⁵⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153972).

136566 is an abundant number, since it is smaller than the sum of its proper divisors (171378).

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

136566 is an equidigital number, since it uses as much as digits as its factorization.

136566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 286 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 136566 is about 369.5483730177. The cubic root of 136566 is about 51.4968735338.

It can be divided in two parts, 1365 and 66, that added together give a triangular number (1431 = T₅₃).

The spelling of 136566 in words is "one hundred thirty-six thousand, five hundred sixty-six".