111011666685 has 16 divisors (see below), whose sum is σ = 181397788416. Its totient is φ = 57946515008.

The previous prime is 111011666659. The next prime is 111011666747. The reversal of 111011666685 is 586666110111.

It is a cyclic number.

It is not a de Polignac number, because 111011666685 - 2⁵ = 111011666653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78730974 + ... + 78732383.

It is an arithmetic number, because the mean of its divisors is an integer number (11337361776).

Almost surely, 2^111011666685 is an apocalyptic number.

111011666685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111011666685 is a deficient number, since it is larger than the sum of its proper divisors (70386121731).

111011666685 is a wasteful number, since it uses less digits than its factorization.

111011666685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157463412.

The product of its (nonzero) digits is 51840, while the sum is 42.

Adding to 111011666685 its reverse (586666110111), we get a palindrome (697677776796).

The spelling of 111011666685 in words is "one hundred eleven billion, eleven million, six hundred sixty-six thousand, six hundred eighty-five".