111006666 has 16 divisors (see below), whose sum is σ = 246681600. Its totient is φ = 37002204.

The previous prime is 111006619. The next prime is 111006673. The reversal of 111006666 is 666600111.

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

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027786 + ... + 1027893.

It is an arithmetic number, because the mean of its divisors is an integer number (15417600).

Almost surely, 2^111006666 is an apocalyptic number.

111006666 is an abundant number, since it is smaller than the sum of its proper divisors (135674934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111006666 is a wasteful number, since it uses less digits than its factorization.

111006666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055690 (or 2055684 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 111006666 is about 10535.9701024633. The cubic root of 111006666 is about 480.5991736283.

Adding to 111006666 its reverse (666600111), we get a palindrome (777606777).

It can be divided in two parts, 11100 and 6666, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 111006666 in words is "one hundred eleven million, six thousand, six hundred sixty-six".