118665 has 20 divisors (see below), whose sum is σ = 213444. Its totient is φ = 63072.

The previous prime is 118661. The next prime is 118669. The reversal of 118665 is 566811.

It is an interprime number because it is at equal distance from previous prime (118661) and next prime (118669).

It can be written as a sum of positive squares in 2 ways, for example, as 82944 + 35721 = 288^2 + 189^2 .

It is not a de Polignac number, because 118665 - 2² = 118661 is a prime.

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

It is a Curzon number.

118665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (118661) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 259 + ... + 551.

2¹¹⁸⁶⁶⁵ is an apocalyptic number.

118665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

118665 is a deficient number, since it is larger than the sum of its proper divisors (94779).

118665 is an equidigital number, since it uses as much as digits as its factorization.

118665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 301 counting only the distinct ones).

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

The square root of 118665 is about 344.4778657621. The cubic root of 118665 is about 49.1406482402.

The spelling of 118665 in words is "one hundred eighteen thousand, six hundred sixty-five".