111333666889 has 3 divisors (see below), whose sum is σ = 111334000557. Its totient is φ = 111333333222.

The previous prime is 111333666751. The next prime is 111333666929. The reversal of 111333666889 is 988666333111.

The square root of 111333666889 is 333667.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 988666333111 = 55351 ⋅17861761.

It is not a de Polignac number, because 111333666889 - 2⁹ = 111333666377 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (111363666889) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 166834 + ... + 500500.

It is an arithmetic number, because the mean of its divisors is an integer number (37111333519).

Almost surely, 2^111333666889 is an apocalyptic number.

111333666889 is the 333667-th square number.

111333666889 is the 166834-th centered octagonal number.

It is an amenable number.

111333666889 is a deficient number, since it is larger than the sum of its proper divisors (333668).

111333666889 is an frugal number, since it uses more digits than its factorization.

111333666889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667334 (or 333667 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The spelling of 111333666889 in words is "one hundred eleven billion, three hundred thirty-three million, six hundred sixty-six thousand, eight hundred eighty-nine".