111666160550 has 48 divisors (see below), whose sum is σ = 239720630112. Its totient is φ = 37906464000.

The previous prime is 111666160549. The next prime is 111666160553. The reversal of 111666160550 is 55061666111.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111666160553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1544087 + ... + 1614786.

It is an arithmetic number, because the mean of its divisors is an integer number (4994179794).

Almost surely, 2^111666160550 is an apocalyptic number.

111666160550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111666160550 is an abundant number, since it is smaller than the sum of its proper divisors (128054469562).

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

111666160550 is a wasteful number, since it uses less digits than its factorization.

111666160550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158993 (or 3158988 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

It can be divided in two parts, 11166 and 6160550, that added together give a palindrome (6171716).

The spelling of 111666160550 in words is "one hundred eleven billion, six hundred sixty-six million, one hundred sixty thousand, five hundred fifty".