66241369 has 2 divisors, whose sum is σ = 66241370. Its totient is φ = 66241368.

The previous prime is 66241339. The next prime is 66241379. The reversal of 66241369 is 96314266.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61042969 + 5198400 = 7813^2 + 2280^2 .

It is a cyclic number.

It is not a de Polignac number, because 66241369 - 2¹⁵ = 66208601 is a prime.

It is a super-2 number, since 2×66241369² = 8775837933988322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66241309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33120684 + 33120685.

It is an arithmetic number, because the mean of its divisors is an integer number (33120685).

Almost surely, 2^66241369 is an apocalyptic number.

It is an amenable number.

66241369 is a deficient number, since it is larger than the sum of its proper divisors (1).

66241369 is an equidigital number, since it uses as much as digits as its factorization.

66241369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 66241369 is about 8138.8800826649. The cubic root of 66241369 is about 404.6160441778.

The spelling of 66241369 in words is "sixty-six million, two hundred forty-one thousand, three hundred sixty-nine".