12668181 has 8 divisors (see below), whose sum is σ = 17435904. Its totient is φ = 8172960.

The previous prime is 12668153. The next prime is 12668191. The reversal of 12668181 is 18186621.

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

It is not a de Polignac number, because 12668181 - 2¹¹ = 12666133 is a prime.

It is a super-2 number, since 2×12668181² = 320965619697522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12668191) 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, 68016 + ... + 68201.

It is an arithmetic number, because the mean of its divisors is an integer number (2179488).

Almost surely, 2^12668181 is an apocalyptic number.

It is an amenable number.

12668181 is a deficient number, since it is larger than the sum of its proper divisors (4767723).

12668181 is a wasteful number, since it uses less digits than its factorization.

12668181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136251.

The product of its digits is 4608, while the sum is 33.

The square root of 12668181 is about 3559.2388231193. The cubic root of 12668181 is about 233.1156443619.

The spelling of 12668181 in words is "twelve million, six hundred sixty-eight thousand, one hundred eighty-one".