1066111247 has 4 divisors (see below), whose sum is σ = 1067615640. Its totient is φ = 1064606856.

The previous prime is 1066111219. The next prime is 1066111283. The reversal of 1066111247 is 7421116601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7421116601 = 43 ⋅172584107.

It is a cyclic number.

It is not a de Polignac number, because 1066111247 - 2¹² = 1066107151 is a prime.

It is a super-2 number, since 2×1066111247² = 2273186381959790018, 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 (1066111447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751133 + ... + 752550.

It is an arithmetic number, because the mean of its divisors is an integer number (266903910).

Almost surely, 2^1066111247 is an apocalyptic number.

1066111247 is a deficient number, since it is larger than the sum of its proper divisors (1504393).

1066111247 is an equidigital number, since it uses as much as digits as its factorization.

1066111247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504392.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1066111247 is about 32651.3590375653. The cubic root of 1066111247 is about 1021.5685360140.

Adding to 1066111247 its reverse (7421116601), we get a palindrome (8487227848).

The spelling of 1066111247 in words is "one billion, sixty-six million, one hundred eleven thousand, two hundred forty-seven".