66228733 has 2 divisors, whose sum is σ = 66228734. Its totient is φ = 66228732.

The previous prime is 66228713. The next prime is 66228769. The reversal of 66228733 is 33782266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54952569 + 11276164 = 7413^2 + 3358^2 .

It is a cyclic number.

It is not a de Polignac number, because 66228733 - 2⁹ = 66228221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66228692 and 66228701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66228703) 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, 33114366 + 33114367.

It is an arithmetic number, because the mean of its divisors is an integer number (33114367).

Almost surely, 2^66228733 is an apocalyptic number.

It is an amenable number.

66228733 is a deficient number, since it is larger than the sum of its proper divisors (1).

66228733 is an equidigital number, since it uses as much as digits as its factorization.

66228733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 66228733 is about 8138.1037717640. The cubic root of 66228733 is about 404.5903147706.

The spelling of 66228733 in words is "sixty-six million, two hundred twenty-eight thousand, seven hundred thirty-three".