1066612111 has 4 divisors (see below), whose sum is σ = 1068527592. Its totient is φ = 1064696632.

The previous prime is 1066612109. The next prime is 1066612117. The reversal of 1066612111 is 1112166601.

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 1066612111 - 2¹ = 1066612109 is a prime.

It is a super-2 number, since 2×1066612111² = 2275322790663752642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066612117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956905 + ... + 958018.

It is an arithmetic number, because the mean of its divisors is an integer number (267131898).

Almost surely, 2^1066612111 is an apocalyptic number.

1066612111 is a deficient number, since it is larger than the sum of its proper divisors (1915481).

1066612111 is an equidigital number, since it uses as much as digits as its factorization.

1066612111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915480.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1066612111 is about 32659.0280167674. The cubic root of 1066612111 is about 1021.7284901769.

Adding to 1066612111 its reverse (1112166601), we get a palindrome (2178778712).

The spelling of 1066612111 in words is "one billion, sixty-six million, six hundred twelve thousand, one hundred eleven".