66028229 has 2 divisors, whose sum is σ = 66028230. Its totient is φ = 66028228.

The previous prime is 66028217. The next prime is 66028241. The reversal of 66028229 is 92282066.

It is a balanced prime because it is at equal distance from previous prime (66028217) and next prime (66028241).

It can be written as a sum of positive squares in only one way, i.e., 48580900 + 17447329 = 6970^2 + 4177^2 .

It is a cyclic number.

It is not a de Polignac number, because 66028229 - 2¹⁶ = 65962693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66028829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33014114 + 33014115.

It is an arithmetic number, because the mean of its divisors is an integer number (33014115).

Almost surely, 2^66028229 is an apocalyptic number.

It is an amenable number.

66028229 is a deficient number, since it is larger than the sum of its proper divisors (1).

66028229 is an equidigital number, since it uses as much as digits as its factorization.

66028229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 66028229 is about 8125.7755937510. The cubic root of 66028229 is about 404.1816100945.

The spelling of 66028229 in words is "sixty-six million, twenty-eight thousand, two hundred twenty-nine".