111100605666 has 16 divisors (see below), whose sum is σ = 222211171584. Its totient is φ = 37031875184.

The previous prime is 111100605661. The next prime is 111100605677. The reversal of 111100605666 is 666506001111.

It is not an unprimeable number, because it can be changed into a prime (111100605661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265881 + ... + 541196.

It is an arithmetic number, because the mean of its divisors is an integer number (13888198224).

Almost surely, 2^111100605666 is an apocalyptic number.

111100605666 is an abundant number, since it is smaller than the sum of its proper divisors (111110565918).

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

111100605666 is a wasteful number, since it uses less digits than its factorization.

111100605666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830025.

The product of its (nonzero) digits is 6480, while the sum is 33.

Adding to 111100605666 its reverse (666506001111), we get a palindrome (777606606777).

The spelling of 111100605666 in words is "one hundred eleven billion, one hundred million, six hundred five thousand, six hundred sixty-six".