12666223554331 has 8 divisors (see below), whose sum is σ = 12694367423520. Its totient is φ = 12638081554368.

The previous prime is 12666223554329. The next prime is 12666223554343. The reversal of 12666223554331 is 13345532266621.

12666223554331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12666223554331 - 2¹ = 12666223554329 is a prime.

It is a super-2 number, since 2×12666223554331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12666223554371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13567650 + ... + 14471128.

It is an arithmetic number, because the mean of its divisors is an integer number (1586795927940).

Almost surely, 2^{12666223554331} is an apocalyptic number.

12666223554331 is a deficient number, since it is larger than the sum of its proper divisors (28143869189).

12666223554331 is an equidigital number, since it uses as much as digits as its factorization.

12666223554331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934613.

The product of its digits is 4665600, while the sum is 49.

The spelling of 12666223554331 in words is "twelve trillion, six hundred sixty-six billion, two hundred twenty-three million, five hundred fifty-four thousand, three hundred thirty-one".