111016661 has 8 divisors (see below), whose sum is σ = 126979584. Its totient is φ = 95079600.

The previous prime is 111016621. The next prime is 111016667. The reversal of 111016661 is 166610111.

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

It is not a de Polignac number, because 111016661 - 2²² = 106822357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111016667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3836 + ... + 15386.

It is an arithmetic number, because the mean of its divisors is an integer number (15872448).

Almost surely, 2^111016661 is an apocalyptic number.

It is an amenable number.

111016661 is a deficient number, since it is larger than the sum of its proper divisors (15962923).

111016661 is a wasteful number, since it uses less digits than its factorization.

111016661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12931.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 111016661 is about 10536.4444192526. Note that the first 4 decimals coincide. The cubic root of 111016661 is about 480.6135975206.

Adding to 111016661 its reverse (166610111), we get a palindrome (277626772).

It can be divided in two parts, 1110 and 16661, that added together give a palindrome (17771).

The spelling of 111016661 in words is "one hundred eleven million, sixteen thousand, six hundred sixty-one".