2116011201666 has 32 divisors (see below), whose sum is σ = 4454876774400. Its totient is φ = 668196611280.

The previous prime is 2116011201659. The next prime is 2116011201673. The reversal of 2116011201666 is 6661021106112.

It is an interprime number because it is at equal distance from previous prime (2116011201659) and next prime (2116011201673).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4556415 + ... + 4999293.

It is an arithmetic number, because the mean of its divisors is an integer number (139214899200).

Almost surely, 2^{2116011201666} is an apocalyptic number.

2116011201666 is an abundant number, since it is smaller than the sum of its proper divisors (2338865572734).

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

2116011201666 is a wasteful number, since it uses less digits than its factorization.

2116011201666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484814.

The product of its (nonzero) digits is 5184, while the sum is 33.

Adding to 2116011201666 its reverse (6661021106112), we get a palindrome (8777032307778).

The spelling of 2116011201666 in words is "two trillion, one hundred sixteen billion, eleven million, two hundred one thousand, six hundred sixty-six".