66441097 has 2 divisors, whose sum is σ = 66441098. Its totient is φ = 66441096.

The previous prime is 66441071. The next prime is 66441101. The reversal of 66441097 is 79014466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47045881 + 19395216 = 6859^2 + 4404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66441097 is a prime.

It is not a weakly prime, because it can be changed into another prime (66441007) 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, 33220548 + 33220549.

It is an arithmetic number, because the mean of its divisors is an integer number (33220549).

Almost surely, 2^66441097 is an apocalyptic number.

It is an amenable number.

66441097 is a deficient number, since it is larger than the sum of its proper divisors (1).

66441097 is an equidigital number, since it uses as much as digits as its factorization.

66441097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 66441097 is about 8151.1408403977. The cubic root of 66441097 is about 405.0222961865.

The spelling of 66441097 in words is "sixty-six million, four hundred forty-one thousand, ninety-seven".