111866722866 has 32 divisors (see below), whose sum is σ = 252094032000. Its totient is φ = 36763710480.

The previous prime is 111866722843. The next prime is 111866722889. The reversal of 111866722866 is 668227668111.

It is an interprime number because it is at equal distance from previous prime (111866722843) and next prime (111866722889).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 14584941 + ... + 14592608.

It is an arithmetic number, because the mean of its divisors is an integer number (7877938500).

Almost surely, 2^111866722866 is an apocalyptic number.

111866722866 is an abundant number, since it is smaller than the sum of its proper divisors (140227309134).

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

111866722866 is a wasteful number, since it uses less digits than its factorization.

111866722866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29177631 (or 29177625 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 111866722866 in words is "one hundred eleven billion, eight hundred sixty-six million, seven hundred twenty-two thousand, eight hundred sixty-six".