2016661650611 has 4 divisors (see below), whose sum is σ = 2019025850352. Its totient is φ = 2014297450872.

The previous prime is 2016661650581. The next prime is 2016661650617. The reversal of 2016661650611 is 1160561666102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2016661650611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2016661650617) 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 3 ways as a sum of consecutive naturals, for example, 1182098591 + ... + 1182100296.

It is an arithmetic number, because the mean of its divisors is an integer number (504756462588).

Almost surely, 2^{2016661650611} is an apocalyptic number.

2016661650611 is a deficient number, since it is larger than the sum of its proper divisors (2364199741).

2016661650611 is an equidigital number, since it uses as much as digits as its factorization.

2016661650611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364199740.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 2016661650611 in words is "two trillion, sixteen billion, six hundred sixty-one million, six hundred fifty thousand, six hundred eleven".