666016229 has 2 divisors, whose sum is σ = 666016230. Its totient is φ = 666016228.

The previous prime is 666016223. The next prime is 666016277. The reversal of 666016229 is 922610666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 664453729 + 1562500 = 25777^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 666016229 - 2²⁸ = 397580773 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 666016192 and 666016201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666016223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333008114 + 333008115.

It is an arithmetic number, because the mean of its divisors is an integer number (333008115).

Almost surely, 2^666016229 is an apocalyptic number.

It is an amenable number.

666016229 is a deficient number, since it is larger than the sum of its proper divisors (1).

666016229 is an equidigital number, since it uses as much as digits as its factorization.

666016229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 666016229 is about 25807.2902297006. The cubic root of 666016229 is about 873.2962674704.

The spelling of 666016229 in words is "six hundred sixty-six million, sixteen thousand, two hundred twenty-nine".