111716661 has 8 divisors (see below), whose sum is σ = 170234944. Its totient is φ = 63838080.

The previous prime is 111716651. The next prime is 111716687. The reversal of 111716661 is 166617111.

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

It is not a de Polignac number, because 111716661 - 2⁵ = 111716629 is a prime.

It is a super-2 number, since 2×111716661² = 24961224689977842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111716621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2659900 + ... + 2659941.

It is an arithmetic number, because the mean of its divisors is an integer number (21279368).

Almost surely, 2^111716661 is an apocalyptic number.

It is an amenable number.

111716661 is a deficient number, since it is larger than the sum of its proper divisors (58518283).

111716661 is an equidigital number, since it uses as much as digits as its factorization.

111716661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5319851.

The product of its digits is 1512, while the sum is 30.

The square root of 111716661 is about 10569.6102577153. The cubic root of 111716661 is about 481.6216290442.

The spelling of 111716661 in words is "one hundred eleven million, seven hundred sixteen thousand, six hundred sixty-one".