12662617105 has 4 divisors (see below), whose sum is σ = 15195140532. Its totient is φ = 10130093680.

The previous prime is 12662617103. The next prime is 12662617129. The reversal of 12662617105 is 50171626621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50171626621 = 122051 ⋅411071.

It can be written as a sum of positive squares in 2 ways, for example, as 3847472784 + 8815144321 = 62028^2 + 93889^2 .

It is not a de Polignac number, because 12662617105 - 2¹ = 12662617103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12662617103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266261706 + ... + 1266261715.

It is an arithmetic number, because the mean of its divisors is an integer number (3798785133).

Almost surely, 2^12662617105 is an apocalyptic number.

It is an amenable number.

12662617105 is a deficient number, since it is larger than the sum of its proper divisors (2532523427).

12662617105 is an equidigital number, since it uses as much as digits as its factorization.

12662617105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532523426.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 12662617105 in words is "twelve billion, six hundred sixty-two million, six hundred seventeen thousand, one hundred five".