66804383 has 2 divisors, whose sum is σ = 66804384. Its totient is φ = 66804382.

The previous prime is 66804341. The next prime is 66804389. The reversal of 66804383 is 38340866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66804383 - 2⁶ = 66804319 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66804389) 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, 33402191 + 33402192.

It is an arithmetic number, because the mean of its divisors is an integer number (33402192).

Almost surely, 2^66804383 is an apocalyptic number.

66804383 is a deficient number, since it is larger than the sum of its proper divisors (1).

66804383 is an equidigital number, since it uses as much as digits as its factorization.

66804383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 66804383 is about 8173.3948271205. The cubic root of 66804383 is about 405.7591471881.

The spelling of 66804383 in words is "sixty-six million, eight hundred four thousand, three hundred eighty-three".