66005500110111 has 6 divisors (see below), whose sum is σ = 95341277936840. Its totient is φ = 44003666740068.

The previous prime is 66005500110107. The next prime is 66005500110119. The reversal of 66005500110111 is 11101100550066.

66005500110111 is a `hidden beast` number, since 6 + 6 + 0 + 0 + 550 + 0 + 1 + 101 + 1 + 1 = 666.

It is not a de Polignac number, because 66005500110111 - 2² = 66005500110107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66005500110119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3666972228331 + ... + 3666972228348.

Almost surely, 2^{66005500110111} is an apocalyptic number.

66005500110111 is a deficient number, since it is larger than the sum of its proper divisors (29335777826729).

66005500110111 is a wasteful number, since it uses less digits than its factorization.

66005500110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7333944456685 (or 7333944456682 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

Adding to 66005500110111 its reverse (11101100550066), we get a palindrome (77106600660177).

The spelling of 66005500110111 in words is "sixty-six trillion, five billion, five hundred million, one hundred ten thousand, one hundred eleven".