1660111550105 has 8 divisors (see below), whose sum is σ = 1993226648832. Its totient is φ = 1327360714288.

The previous prime is 1660111550029. The next prime is 1660111550107. The reversal of 1660111550105 is 5010551110661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1660111550105 - 2¹⁴ = 1660111533721 is a prime.

It is a super-2 number, since 2×1660111550105² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660111550107) 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, 91055699 + ... + 91073928.

It is an arithmetic number, because the mean of its divisors is an integer number (249153331104).

Almost surely, 2^{1660111550105} is an apocalyptic number.

It is an amenable number.

1660111550105 is a deficient number, since it is larger than the sum of its proper divisors (333115098727).

1660111550105 is a wasteful number, since it uses less digits than its factorization.

1660111550105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182131455.

The product of its (nonzero) digits is 4500, while the sum is 32.

Adding to 1660111550105 its reverse (5010551110661), we get a palindrome (6670662660766).

The spelling of 1660111550105 in words is "one trillion, six hundred sixty billion, one hundred eleven million, five hundred fifty thousand, one hundred five".