66826733 has 2 divisors, whose sum is σ = 66826734. Its totient is φ = 66826732.

The previous prime is 66826723. The next prime is 66826789. The reversal of 66826733 is 33762866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63792169 + 3034564 = 7987^2 + 1742^2 .

It is a cyclic number.

It is not a de Polignac number, because 66826733 - 2¹⁰ = 66825709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66826723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33413366 + 33413367.

It is an arithmetic number, because the mean of its divisors is an integer number (33413367).

Almost surely, 2^66826733 is an apocalyptic number.

It is an amenable number.

66826733 is a deficient number, since it is larger than the sum of its proper divisors (1).

66826733 is an equidigital number, since it uses as much as digits as its factorization.

66826733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The square root of 66826733 is about 8174.7619537207. The cubic root of 66826733 is about 405.8043922523.

The spelling of 66826733 in words is "sixty-six million, eight hundred twenty-six thousand, seven hundred thirty-three".