65998073 has 2 divisors, whose sum is σ = 65998074. Its totient is φ = 65998072.

The previous prime is 65998067. The next prime is 65998081. The reversal of 65998073 is 37089956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65157184 + 840889 = 8072^2 + 917^2 .

It is a cyclic number.

It is not a de Polignac number, because 65998073 - 2¹⁰ = 65997049 is a prime.

It is not a weakly prime, because it can be changed into another prime (65998003) 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, 32999036 + 32999037.

It is an arithmetic number, because the mean of its divisors is an integer number (32999037).

Almost surely, 2^65998073 is an apocalyptic number.

It is an amenable number.

65998073 is a deficient number, since it is larger than the sum of its proper divisors (1).

65998073 is an equidigital number, since it uses as much as digits as its factorization.

65998073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 65998073 is about 8123.9198051187. The cubic root of 65998073 is about 404.1200689585.

The spelling of 65998073 in words is "sixty-five million, nine hundred ninety-eight thousand, seventy-three".