12666213258 has 16 divisors (see below), whose sum is σ = 25390136640. Its totient is φ = 4212452736.

The previous prime is 12666213223. The next prime is 12666213319. The reversal of 12666213258 is 85231266621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2401735 + ... + 2407002.

It is an arithmetic number, because the mean of its divisors is an integer number (1586883540).

Almost surely, 2^12666213258 is an apocalyptic number.

12666213258 is an abundant number, since it is smaller than the sum of its proper divisors (12723923382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12666213258 is a wasteful number, since it uses less digits than its factorization.

12666213258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4809181.

The product of its digits is 207360, while the sum is 42.

Adding to 12666213258 its reverse (85231266621), we get a palindrome (97897479879).

The spelling of 12666213258 in words is "twelve billion, six hundred sixty-six million, two hundred thirteen thousand, two hundred fifty-eight".