12662432171 has 4 divisors (see below), whose sum is σ = 12663717144. Its totient is φ = 12661147200.

The previous prime is 12662432147. The next prime is 12662432207. The reversal of 12662432171 is 17123426621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17123426621 = 7 ⋅2446203803.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12662432171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12662432131) 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, 627590 + ... + 647451.

It is an arithmetic number, because the mean of its divisors is an integer number (3165929286).

Almost surely, 2^12662432171 is an apocalyptic number.

12662432171 is a deficient number, since it is larger than the sum of its proper divisors (1284973).

12662432171 is an equidigital number, since it uses as much as digits as its factorization.

12662432171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284972.

The product of its digits is 24192, while the sum is 35.

Adding to 12662432171 its reverse (17123426621), we get a palindrome (29785858792).

The spelling of 12662432171 in words is "twelve billion, six hundred sixty-two million, four hundred thirty-two thousand, one hundred seventy-one".