1116601011661 has 8 divisors (see below), whose sum is σ = 1127943876600. Its totient is φ = 1105263782400.

The previous prime is 1116601011623. The next prime is 1116601011683. The reversal of 1116601011661 is 1661101066111.

It can be written as a sum of positive squares in 4 ways, for example, as 572519222500 + 544081789161 = 756650^2 + 737619^2 .

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 1116601011661 - 2¹¹ = 1116601009613 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 (1116601012661) 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 7 ways as a sum of consecutive naturals, for example, 1010076 + ... + 1803733.

It is an arithmetic number, because the mean of its divisors is an integer number (140992984575).

Almost surely, 2^{1116601011661} is an apocalyptic number.

It is an amenable number.

1116601011661 is a deficient number, since it is larger than the sum of its proper divisors (11342864939).

1116601011661 is a wasteful number, since it uses less digits than its factorization.

1116601011661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817839.

The product of its (nonzero) digits is 1296, while the sum is 31.

Adding to 1116601011661 its reverse (1661101066111), we get a palindrome (2777702077772).

The spelling of 1116601011661 in words is "one trillion, one hundred sixteen billion, six hundred one million, eleven thousand, six hundred sixty-one".