1066144249 has 4 divisors (see below), whose sum is σ = 1067992564. Its totient is φ = 1064295936.

The previous prime is 1066144241. The next prime is 1066144253. The reversal of 1066144249 is 9424416601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9424416601 = 26399 ⋅356999.

It can be written as a sum of positive squares in 2 ways, for example, as 1002862224 + 63282025 = 31668^2 + 7955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066144249 - 2³ = 1066144241 is a prime.

It is a super-2 number, since 2×1066144249² = 2273327119351548002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066144241) 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, 923292 + ... + 924445.

It is an arithmetic number, because the mean of its divisors is an integer number (266998141).

Almost surely, 2^1066144249 is an apocalyptic number.

It is an amenable number.

1066144249 is a deficient number, since it is larger than the sum of its proper divisors (1848315).

1066144249 is an equidigital number, since it uses as much as digits as its factorization.

1066144249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848314.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 1066144249 is about 32651.8644031241. The cubic root of 1066144249 is about 1021.5790769580.

The spelling of 1066144249 in words is "one billion, sixty-six million, one hundred forty-four thousand, two hundred forty-nine".