116661 has 8 divisors (see below), whose sum is σ = 159904. Its totient is φ = 75600.

The previous prime is 116657. The next prime is 116663. The reversal of 116661 is 166611.

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

It is not a de Polignac number, because 116661 - 2² = 116657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 116661.

It is not an unprimeable number, because it can be changed into a prime (116663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415 + ... + 636.

It is an arithmetic number, because the mean of its divisors is an integer number (19988).

2¹¹⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

116661 is a deficient number, since it is larger than the sum of its proper divisors (43243).

116661 is a wasteful number, since it uses less digits than its factorization.

116661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091.

The product of its digits is 216, while the sum is 21.

The square root of 116661 is about 341.5567302806. The cubic root of 116661 is about 48.8624491640.

It can be divided in two parts, 116 and 661, that added together give a palindrome (777).

The spelling of 116661 in words is "one hundred sixteen thousand, six hundred sixty-one".