66038299 has 2 divisors, whose sum is σ = 66038300. Its totient is φ = 66038298.

The previous prime is 66038263. The next prime is 66038317. The reversal of 66038299 is 99283066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66038299 - 2¹⁹ = 65514011 is a prime.

It is a super-3 number, since 3×66038299³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (66038099) 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, 33019149 + 33019150.

It is an arithmetic number, because the mean of its divisors is an integer number (33019150).

Almost surely, 2^66038299 is an apocalyptic number.

66038299 is a deficient number, since it is larger than the sum of its proper divisors (1).

66038299 is an equidigital number, since it uses as much as digits as its factorization.

66038299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 66038299 is about 8126.3952032866. The cubic root of 66038299 is about 404.2021563668.

The spelling of 66038299 in words is "sixty-six million, thirty-eight thousand, two hundred ninety-nine".