12666029 has 2 divisors, whose sum is σ = 12666030. Its totient is φ = 12666028.

The previous prime is 12666019. The next prime is 12666047. The reversal of 12666029 is 92066621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8352100 + 4313929 = 2890^2 + 2077^2 .

It is a cyclic number.

It is not a de Polignac number, because 12666029 - 2¹⁶ = 12600493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12665986 and 12666004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12666019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6333014 + 6333015.

It is an arithmetic number, because the mean of its divisors is an integer number (6333015).

Almost surely, 2^12666029 is an apocalyptic number.

It is an amenable number.

12666029 is a deficient number, since it is larger than the sum of its proper divisors (1).

12666029 is an equidigital number, since it uses as much as digits as its factorization.

12666029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 12666029 is about 3558.9364984501. The cubic root of 12666029 is about 233.1024434855.

The spelling of 12666029 in words is "twelve million, six hundred sixty-six thousand, twenty-nine".