66284843 has 2 divisors, whose sum is σ = 66284844. Its totient is φ = 66284842.

The previous prime is 66284839. The next prime is 66284849. The reversal of 66284843 is 34848266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66284843 - 2² = 66284839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66284843.

It is not a weakly prime, because it can be changed into another prime (66284849) 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, 33142421 + 33142422.

It is an arithmetic number, because the mean of its divisors is an integer number (33142422).

Almost surely, 2^66284843 is an apocalyptic number.

66284843 is a deficient number, since it is larger than the sum of its proper divisors (1).

66284843 is an equidigital number, since it uses as much as digits as its factorization.

66284843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 41.

The square root of 66284843 is about 8141.5504051747. The cubic root of 66284843 is about 404.7045408953.

The spelling of 66284843 in words is "sixty-six million, two hundred eighty-four thousand, eight hundred forty-three".