12545261066 has 16 divisors (see below), whose sum is σ = 20385342600. Its totient is φ = 5790118464.

The previous prime is 12545261063. The next prime is 12545261077. The reversal of 12545261066 is 66016254521.

It can be written as a sum of positive squares in 4 ways, for example, as 7756225 + 12537504841 = 2785^2 + 111971^2 .

It is not an unprimeable number, because it can be changed into a prime (12545261063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1423151 + ... + 1431938.

Almost surely, 2^12545261066 is an apocalyptic number.

12545261066 is a deficient number, since it is larger than the sum of its proper divisors (7840081534).

12545261066 is an equidigital number, since it uses as much as digits as its factorization.

12545261066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855130 (or 2855104 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 12545261066 in words is "twelve billion, five hundred forty-five million, two hundred sixty-one thousand, sixty-six".