12660075289 has 9 divisors (see below), whose sum is σ = 13015767261. Its totient is φ = 12313860480.

The previous prime is 12660075283. The next prime is 12660075319. The reversal of 12660075289 is 98257006621.

The square root of 12660075289 is 112517.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 10007001225 + 2653074064 = 100035^2 + 51508^2 .

It is not a de Polignac number, because 12660075289 - 2⁵ = 12660075257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12660075283) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4161609 + ... + 4164649.

Almost surely, 2^12660075289 is an apocalyptic number.

12660075289 is the 112517-th square number.

12660075289 is the 56259-th centered octagonal number.

It is an amenable number.

12660075289 is a deficient number, since it is larger than the sum of its proper divisors (355691972).

12660075289 is an frugal number, since it uses more digits than its factorization.

12660075289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6156 (or 3078 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 12660075289 in words is "twelve billion, six hundred sixty million, seventy-five thousand, two hundred eighty-nine".