66000111 has 4 divisors (see below), whose sum is σ = 88000152. Its totient is φ = 44000072.

The previous prime is 66000083. The next prime is 66000149. The reversal of 66000111 is 11100066.

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 66000111 - 2⁶ = 66000047 is a prime.

66000111 is a modest number, since divided by 111 gives 66 as remainder.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66000811) 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, 11000016 + ... + 11000021.

It is an arithmetic number, because the mean of its divisors is an integer number (22000038).

Almost surely, 2^66000111 is an apocalyptic number.

66000111 is a deficient number, since it is larger than the sum of its proper divisors (22000041).

66000111 is a wasteful number, since it uses less digits than its factorization.

66000111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22000040.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 66000111 is about 8124.0452362108. The cubic root of 66000111 is about 404.1242286165.

Adding to 66000111 its reverse (11100066), we get a palindrome (77100177).

The spelling of 66000111 in words is "sixty-six million, one hundred eleven", and thus it is an aban number.