66430229 has 2 divisors, whose sum is σ = 66430230. Its totient is φ = 66430228.

The previous prime is 66430211. The next prime is 66430249. The reversal of 66430229 is 92203466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66178225 + 252004 = 8135^2 + 502^2 .

It is a cyclic number.

It is not a de Polignac number, because 66430229 - 2¹⁶ = 66364693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66430195 and 66430204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66430249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33215114 + 33215115.

It is an arithmetic number, because the mean of its divisors is an integer number (33215115).

Almost surely, 2^66430229 is an apocalyptic number.

It is an amenable number.

66430229 is a deficient number, since it is larger than the sum of its proper divisors (1).

66430229 is an equidigital number, since it uses as much as digits as its factorization.

66430229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 66430229 is about 8150.4741579861. The cubic root of 66430229 is about 405.0002113498. Note that the first 3 decimals are identical.

The spelling of 66430229 in words is "sixty-six million, four hundred thirty thousand, two hundred twenty-nine".