118566 has 24 divisors (see below), whose sum is σ = 293904. Its totient is φ = 33840.

The previous prime is 118549. The next prime is 118571. The reversal of 118566 is 665811.

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, 345 + ... + 596.

It is an arithmetic number, because the mean of its divisors is an integer number (12246).

2¹¹⁸⁵⁶⁶ is an apocalyptic number.

118566 is an abundant number, since it is smaller than the sum of its proper divisors (175338).

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

118566 is a wasteful number, since it uses less digits than its factorization.

118566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956 (or 953 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 118566 is about 344.3341400442. The cubic root of 118566 is about 49.1269787288.

It can be divided in two parts, 1185 and 66, that multiplied together give a triangular number (78210 = T₃₉₅).

The spelling of 118566 in words is "one hundred eighteen thousand, five hundred sixty-six".