12814708661 has 4 divisors (see below), whose sum is σ = 12855913824. Its totient is φ = 12773503500.

The previous prime is 12814708639. The next prime is 12814708667. The reversal of 12814708661 is 16680741821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16680741821 = 54617 ⋅305413.

It is a cyclic number.

It is not a de Polignac number, because 12814708661 - 2¹⁰ = 12814707637 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 (12814708667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20602115 + ... + 20602736.

It is an arithmetic number, because the mean of its divisors is an integer number (3213978456).

Almost surely, 2^12814708661 is an apocalyptic number.

It is an amenable number.

12814708661 is a deficient number, since it is larger than the sum of its proper divisors (41205163).

12814708661 is an equidigital number, since it uses as much as digits as its factorization.

12814708661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41205162.

The product of its (nonzero) digits is 129024, while the sum is 44.

The spelling of 12814708661 in words is "twelve billion, eight hundred fourteen million, seven hundred eight thousand, six hundred sixty-one".