12275967661 has 2 divisors, whose sum is σ = 12275967662. Its totient is φ = 12275967660.

The previous prime is 12275967653. The next prime is 12275967673. The reversal of 12275967661 is 16676957221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7623909225 + 4652058436 = 87315^2 + 68206^2 .

It is an emirp because it is prime and its reverse (16676957221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12275967661 - 2³ = 12275967653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12275967599 and 12275967608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12275997661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6137983830 + 6137983831.

It is an arithmetic number, because the mean of its divisors is an integer number (6137983831).

Almost surely, 2^12275967661 is an apocalyptic number.

It is an amenable number.

12275967661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12275967661 is an equidigital number, since it uses as much as digits as its factorization.

12275967661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 52.

The spelling of 12275967661 in words is "twelve billion, two hundred seventy-five million, nine hundred sixty-seven thousand, six hundred sixty-one".