111666606 has 8 divisors (see below), whose sum is σ = 223333224. Its totient is φ = 37222200.

The previous prime is 111666593. The next prime is 111666613. The reversal of 111666606 is 606666111.

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

111666606 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9305545 + ... + 9305556.

It is an arithmetic number, because the mean of its divisors is an integer number (27916653).

Almost surely, 2^111666606 is an apocalyptic number.

111666606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

111666606 is a wasteful number, since it uses less digits than its factorization.

111666606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18611106.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 111666606 is about 10567.2421189258. The cubic root of 111666606 is about 481.5496876053.

The spelling of 111666606 in words is "one hundred eleven million, six hundred sixty-six thousand, six hundred six".