66583289 has 2 divisors, whose sum is σ = 66583290. Its totient is φ = 66583288.

The previous prime is 66583261. The next prime is 66583301. The reversal of 66583289 is 98238566.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36421225 + 30162064 = 6035^2 + 5492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66583289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66583259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33291644 + 33291645.

It is an arithmetic number, because the mean of its divisors is an integer number (33291645).

Almost surely, 2^66583289 is an apocalyptic number.

It is an amenable number.

66583289 is a deficient number, since it is larger than the sum of its proper divisors (1).

66583289 is an equidigital number, since it uses as much as digits as its factorization.

66583289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The square root of 66583289 is about 8159.8583933791. The cubic root of 66583289 is about 405.3110225816.

The spelling of 66583289 in words is "sixty-six million, five hundred eighty-three thousand, two hundred eighty-nine".