2166612606611 has 4 divisors (see below), whose sum is σ = 2166647945112. Its totient is φ = 2166577268112.

The previous prime is 2166612606589. The next prime is 2166612606637. The reversal of 2166612606611 is 1166062166612.

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

It is a cyclic number.

It is not a de Polignac number, because 2166612606611 - 2³⁰ = 2165538864787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166612606661) 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, 17577125 + ... + 17699958.

It is an arithmetic number, because the mean of its divisors is an integer number (541661986278).

Almost surely, 2^{2166612606611} is an apocalyptic number.

2166612606611 is a deficient number, since it is larger than the sum of its proper divisors (35338501).

2166612606611 is an equidigital number, since it uses as much as digits as its factorization.

2166612606611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35338500.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 2166612606611 in words is "two trillion, one hundred sixty-six billion, six hundred twelve million, six hundred six thousand, six hundred eleven".