12661303061 has 32 divisors (see below), whose sum is σ = 15288238080. Its totient is φ = 10350662400.

The previous prime is 12661303021. The next prime is 12661303153. The reversal of 12661303061 is 16030316621.

It is a happy number.

12661303061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12661303061 - 2¹⁰ = 12661302037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661303021) 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 31 ways as a sum of consecutive naturals, for example, 444140 + ... + 471786.

It is an arithmetic number, because the mean of its divisors is an integer number (477757440).

Almost surely, 2^12661303061 is an apocalyptic number.

12661303061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12661303061 is a deficient number, since it is larger than the sum of its proper divisors (2626935019).

12661303061 is a wasteful number, since it uses less digits than its factorization.

12661303061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27785.

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 12661303061 its reverse (16030316621), we get a palindrome (28691619682).

The spelling of 12661303061 in words is "twelve billion, six hundred sixty-one million, three hundred three thousand, sixty-one".