111601011666 has 16 divisors (see below), whose sum is σ = 225891205344. Its totient is φ = 36752140224.

The previous prime is 111601011659. The next prime is 111601011671. The reversal of 111601011666 is 666110106111.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112048711 + ... + 112049706.

It is an arithmetic number, because the mean of its divisors is an integer number (14118200334).

Almost surely, 2^111601011666 is an apocalyptic number.

111601011666 is an abundant number, since it is smaller than the sum of its proper divisors (114290193678).

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

111601011666 is a wasteful number, since it uses less digits than its factorization.

111601011666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224098505.

The product of its (nonzero) digits is 1296, while the sum is 30.

Adding to 111601011666 its reverse (666110106111), we get a palindrome (777711117777).

The spelling of 111601011666 in words is "one hundred eleven billion, six hundred one million, eleven thousand, six hundred sixty-six".