66481243 has 2 divisors, whose sum is σ = 66481244. Its totient is φ = 66481242.

The previous prime is 66481241. The next prime is 66481249. The reversal of 66481243 is 34218466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66481243 - 2¹ = 66481241 is a prime.

Together with 66481241, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 66481199 and 66481208.

It is not a weakly prime, because it can be changed into another prime (66481241) 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, 33240621 + 33240622.

It is an arithmetic number, because the mean of its divisors is an integer number (33240622).

Almost surely, 2^66481243 is an apocalyptic number.

66481243 is a deficient number, since it is larger than the sum of its proper divisors (1).

66481243 is an equidigital number, since it uses as much as digits as its factorization.

66481243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 34.

The square root of 66481243 is about 8153.6030685826. The cubic root of 66481243 is about 405.1038559037.

The spelling of 66481243 in words is "sixty-six million, four hundred eighty-one thousand, two hundred forty-three".