66119281 has 2 divisors, whose sum is σ = 66119282. Its totient is φ = 66119280.

The previous prime is 66119233. The next prime is 66119299. The reversal of 66119281 is 18291166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54997056 + 11122225 = 7416^2 + 3335^2 .

It is a cyclic number.

It is not a de Polignac number, because 66119281 - 2⁷ = 66119153 is a prime.

It is a super-2 number, since 2×66119281² = 8743518639913922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66119201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33059640 + 33059641.

It is an arithmetic number, because the mean of its divisors is an integer number (33059641).

Almost surely, 2^66119281 is an apocalyptic number.

It is an amenable number.

66119281 is a deficient number, since it is larger than the sum of its proper divisors (1).

66119281 is an equidigital number, since it uses as much as digits as its factorization.

66119281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 66119281 is about 8131.3763287650. The cubic root of 66119281 is about 404.3673116810.

The spelling of 66119281 in words is "sixty-six million, one hundred nineteen thousand, two hundred eighty-one".