66000229 has 2 divisors, whose sum is σ = 66000230. Its totient is φ = 66000228.

The previous prime is 66000223. The next prime is 66000247. The reversal of 66000229 is 92200066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37088100 + 28912129 = 6090^2 + 5377^2 .

It is a cyclic number.

It is not a de Polignac number, because 66000229 - 2¹¹ = 65998181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66000223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33000114 + 33000115.

It is an arithmetic number, because the mean of its divisors is an integer number (33000115).

Almost surely, 2^66000229 is an apocalyptic number.

It is an amenable number.

66000229 is a deficient number, since it is larger than the sum of its proper divisors (1).

66000229 is an equidigital number, since it uses as much as digits as its factorization.

66000229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 66000229 is about 8124.0524985995. The cubic root of 66000229 is about 404.1244694576.

The spelling of 66000229 in words is "sixty-six million, two hundred twenty-nine", and thus it is an aban number.