111666768788 has 6 divisors (see below), whose sum is σ = 195416845386. Its totient is φ = 55833384392.

The previous prime is 111666768691. The next prime is 111666768791. The reversal of 111666768788 is 887867666111.

It can be written as a sum of positive squares in only one way, i.e., 75596402704 + 36070366084 = 274948^2 + 189922^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13958346095 + ... + 13958346102.

It is an arithmetic number, because the mean of its divisors is an integer number (32569474231).

Almost surely, 2^111666768788 is an apocalyptic number.

It is an amenable number.

111666768788 is a deficient number, since it is larger than the sum of its proper divisors (83750076598).

111666768788 is a wasteful number, since it uses less digits than its factorization.

111666768788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27916692201 (or 27916692199 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 65.

The spelling of 111666768788 in words is "one hundred eleven billion, six hundred sixty-six million, seven hundred sixty-eight thousand, seven hundred eighty-eight".