110661 has 4 divisors (see below), whose sum is σ = 147552. Its totient is φ = 73772.

The previous prime is 110651. The next prime is 110681. The reversal of 110661 is 166011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166011 = 3 ⋅55337.

It is a cyclic number.

It is not a de Polignac number, because 110661 - 2⁵ = 110629 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 110661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18441 + ... + 18446.

It is an arithmetic number, because the mean of its divisors is an integer number (36888).

2¹¹⁰⁶⁶¹ is an apocalyptic number.

It is an amenable number.

110661 is a deficient number, since it is larger than the sum of its proper divisors (36891).

110661 is an equidigital number, since it uses as much as digits as its factorization.

110661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36890.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 110661 is about 332.6574815031. The cubic root of 110661 is about 48.0099805635.

Adding to 110661 its reverse (166011), we get a palindrome (276672).

The spelling of 110661 in words is "one hundred ten thousand, six hundred sixty-one".