660112111 has 2 divisors, whose sum is σ = 660112112. Its totient is φ = 660112110.

The previous prime is 660112097. The next prime is 660112127. The reversal of 660112111 is 111211066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660112111 - 2¹³ = 660103919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660112711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330056055 + 330056056.

It is an arithmetic number, because the mean of its divisors is an integer number (330056056).

Almost surely, 2^660112111 is an apocalyptic number.

660112111 is a deficient number, since it is larger than the sum of its proper divisors (1).

660112111 is an equidigital number, since it uses as much as digits as its factorization.

660112111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 660112111 is about 25692.6470220567. The cubic root of 660112111 is about 870.7080645209.

Adding to 660112111 its reverse (111211066), we get a palindrome (771323177).

The spelling of 660112111 in words is "six hundred sixty million, one hundred twelve thousand, one hundred eleven".