1066568309 has 4 divisors (see below), whose sum is σ = 1068443340. Its totient is φ = 1064693280.

The previous prime is 1066568303. The next prime is 1066568329. The reversal of 1066568309 is 9038656601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9038656601 = 13 ⋅695281277.

It can be written as a sum of positive squares in 2 ways, for example, as 671950084 + 394618225 = 25922^2 + 19865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066568309 - 2²⁰ = 1065519733 is a prime.

It is a super-2 number, since 2×1066568309² = 2275135915526238962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1066568309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066568303) 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, 936662 + ... + 937799.

It is an arithmetic number, because the mean of its divisors is an integer number (267110835).

Almost surely, 2^1066568309 is an apocalyptic number.

It is an amenable number.

1066568309 is a deficient number, since it is larger than the sum of its proper divisors (1875031).

1066568309 is an equidigital number, since it uses as much as digits as its factorization.

1066568309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875030.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 1066568309 is about 32658.3574142975. The cubic root of 1066568309 is about 1021.7145037228.

The spelling of 1066568309 in words is "one billion, sixty-six million, five hundred sixty-eight thousand, three hundred nine".