66600229 has 2 divisors, whose sum is σ = 66600230. Its totient is φ = 66600228.

The previous prime is 66600223. The next prime is 66600241. The reversal of 66600229 is 92200666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54420129 + 12180100 = 7377^2 + 3490^2 .

It is a cyclic number.

It is not a de Polignac number, because 66600229 - 2¹⁷ = 66469157 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66600229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66600223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33300114 + 33300115.

It is an arithmetic number, because the mean of its divisors is an integer number (33300115).

Almost surely, 2^66600229 is an apocalyptic number.

It is an amenable number.

66600229 is a deficient number, since it is larger than the sum of its proper divisors (1).

66600229 is an equidigital number, since it uses as much as digits as its factorization.

66600229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 66600229 is about 8160.8963355749. The cubic root of 66600229 is about 405.3453924995.

The spelling of 66600229 in words is "sixty-six million, six hundred thousand, two hundred twenty-nine".