12665226205 has 8 divisors (see below), whose sum is σ = 15209784504. Its totient is φ = 10124505600.

The previous prime is 12665226193. The next prime is 12665226227. The reversal of 12665226205 is 50262256621.

It can be written as a sum of positive squares in 4 ways, for example, as 7153945561 + 5511280644 = 84581^2 + 74238^2 .

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

It is not a de Polignac number, because 12665226205 - 2⁹ = 12665225693 is a prime.

It is a Duffinian number.

It is a congruent 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, 952156 + ... + 965365.

It is an arithmetic number, because the mean of its divisors is an integer number (1901223063).

Almost surely, 2^12665226205 is an apocalyptic number.

It is an amenable number.

12665226205 is a deficient number, since it is larger than the sum of its proper divisors (2544558299).

12665226205 is a wasteful number, since it uses less digits than its factorization.

12665226205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918847.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 12665226205 in words is "twelve billion, six hundred sixty-five million, two hundred twenty-six thousand, two hundred five".