115666 has 8 divisors (see below), whose sum is σ = 175104. Its totient is φ = 57300.

The previous prime is 115663. The next prime is 115679. The reversal of 115666 is 666511.

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

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 115666.

It is not an unprimeable number, because it can be changed into a prime (115663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111 + ... + 493.

It is an arithmetic number, because the mean of its divisors is an integer number (21888).

2¹¹⁵⁶⁶⁶ is an apocalyptic number.

115666 is a deficient number, since it is larger than the sum of its proper divisors (59438).

115666 is a wasteful number, since it uses less digits than its factorization.

115666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536.

The product of its digits is 1080, while the sum is 25.

The square root of 115666 is about 340.0970449739. The cubic root of 115666 is about 48.7231366353.

It can be divided in two parts, 11566 and 6, that multiplied together give a palindrome (69396).

The spelling of 115666 in words is "one hundred fifteen thousand, six hundred sixty-six".