111666101055 has 16 divisors (see below), whose sum is σ = 179951130240. Its totient is φ = 59126797728.

The previous prime is 111666100991. The next prime is 111666101059. The reversal of 111666101055 is 550101666111.

It is not a de Polignac number, because 111666101055 - 2⁶ = 111666100991 is a prime.

It is a super-2 number, since 2×111666101055² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111666101059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26776357 + ... + 26780526.

It is an arithmetic number, because the mean of its divisors is an integer number (11246945640).

Almost surely, 2^111666101055 is an apocalyptic number.

111666101055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111666101055 is a deficient number, since it is larger than the sum of its proper divisors (68285029185).

111666101055 is a wasteful number, since it uses less digits than its factorization.

111666101055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53557030.

The product of its (nonzero) digits is 5400, while the sum is 33.

Adding to 111666101055 its reverse (550101666111), we get a palindrome (661767767166).

The spelling of 111666101055 in words is "one hundred eleven billion, six hundred sixty-six million, one hundred one thousand, fifty-five".