12665661035 has 4 divisors (see below), whose sum is σ = 15198793248. Its totient is φ = 10132528824.

The previous prime is 12665660983. The next prime is 12665661121. The reversal of 12665661035 is 53016656621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53016656621 = 23 ⋅2305072027.

It is a cyclic number.

It is not a de Polignac number, because 12665661035 - 2²² = 12661466731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12665660983 and 12665661001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266566099 + ... + 1266566108.

It is an arithmetic number, because the mean of its divisors is an integer number (3799698312).

Almost surely, 2^12665661035 is an apocalyptic number.

12665661035 is a deficient number, since it is larger than the sum of its proper divisors (2533132213).

12665661035 is an equidigital number, since it uses as much as digits as its factorization.

12665661035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533132212.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 12665661035 in words is "twelve billion, six hundred sixty-five million, six hundred sixty-one thousand, thirty-five".