66284773 has 2 divisors, whose sum is σ = 66284774. Its totient is φ = 66284772.

The previous prime is 66284767. The next prime is 66284839. The reversal of 66284773 is 37748266.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63250209 + 3034564 = 7953^2 + 1742^2 .

It is a cyclic number.

It is not a de Polignac number, because 66284773 - 2⁹ = 66284261 is a prime.

It is a super-2 number, since 2×66284773² = 8787342263323058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66284473) 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, 33142386 + 33142387.

It is an arithmetic number, because the mean of its divisors is an integer number (33142387).

Almost surely, 2^66284773 is an apocalyptic number.

It is an amenable number.

66284773 is a deficient number, since it is larger than the sum of its proper divisors (1).

66284773 is an equidigital number, since it uses as much as digits as its factorization.

66284773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 43.

The square root of 66284773 is about 8141.5461062381. The cubic root of 66284773 is about 404.7043984327.

The spelling of 66284773 in words is "sixty-six million, two hundred eighty-four thousand, seven hundred seventy-three".