12668081 has 2 divisors, whose sum is σ = 12668082. Its totient is φ = 12668080.

The previous prime is 12668059. The next prime is 12668087. The reversal of 12668081 is 18086621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12666481 + 1600 = 3559^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 12668081 - 2¹⁴ = 12651697 is a prime.

It is a super-2 number, since 2×12668081² = 320960552445122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12668087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6334040 + 6334041.

It is an arithmetic number, because the mean of its divisors is an integer number (6334041).

Almost surely, 2^12668081 is an apocalyptic number.

It is an amenable number.

12668081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12668081 is an equidigital number, since it uses as much as digits as its factorization.

12668081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 12668081 is about 3559.2247751442. The cubic root of 12668081 is about 233.1150309714.

The spelling of 12668081 in words is "twelve million, six hundred sixty-eight thousand, eighty-one".