12665051626 has 8 divisors (see below), whose sum is σ = 19048510404. Its totient is φ = 6315548160.

The previous prime is 12665051599. The next prime is 12665051627. The reversal of 12665051626 is 62615056621.

It can be written as a sum of positive squares in 2 ways, for example, as 11448786001 + 1216265625 = 106999^2 + 34875^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12665051627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8487895 + ... + 8489386.

Almost surely, 2^12665051626 is an apocalyptic number.

12665051626 is a deficient number, since it is larger than the sum of its proper divisors (6383458778).

12665051626 is a wasteful number, since it uses less digits than its factorization.

12665051626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16977656.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 12665051626 in words is "twelve billion, six hundred sixty-five million, fifty-one thousand, six hundred twenty-six".