12665122265 has 8 divisors (see below), whose sum is σ = 15233248968. Its totient is φ = 10108696320.

The previous prime is 12665122259. The next prime is 12665122273. The reversal of 12665122265 is 56222156621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 286557184 + 12378565081 = 16928^2 + 111259^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12665122265 - 2¹⁰ = 12665121241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2922806 + ... + 2927135.

It is an arithmetic number, because the mean of its divisors is an integer number (1904156121).

Almost surely, 2^12665122265 is an apocalyptic number.

It is an amenable number.

12665122265 is a deficient number, since it is larger than the sum of its proper divisors (2568126703).

12665122265 is an equidigital number, since it uses as much as digits as its factorization.

12665122265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5850379.

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

Adding to 12665122265 its reverse (56222156621), we get a palindrome (68887278886).

The spelling of 12665122265 in words is "twelve billion, six hundred sixty-five million, one hundred twenty-two thousand, two hundred sixty-five".