66611160111 has 4 divisors (see below), whose sum is σ = 88814880152. Its totient is φ = 44407440072.

The previous prime is 66611160101. The next prime is 66611160139. The reversal of 66611160111 is 11106111666.

66611160111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 66611160111 - 2⁷ = 66611159983 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 (66611160101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11101860016 + ... + 11101860021.

It is an arithmetic number, because the mean of its divisors is an integer number (22203720038).

Almost surely, 2^66611160111 is an apocalyptic number.

66611160111 is a deficient number, since it is larger than the sum of its proper divisors (22203720041).

66611160111 is a wasteful number, since it uses less digits than its factorization.

66611160111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22203720040.

The product of its (nonzero) digits is 1296, while the sum is 30.

Adding to 66611160111 its reverse (11106111666), we get a palindrome (77717271777).

The spelling of 66611160111 in words is "sixty-six billion, six hundred eleven million, one hundred sixty thousand, one hundred eleven".