65665150217 has 2 divisors, whose sum is σ = 65665150218. Its totient is φ = 65665150216.

The previous prime is 65665150163. The next prime is 65665150237. The reversal of 65665150217 is 71205156656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40959283456 + 24705866761 = 202384^2 + 157181^2 .

It is a cyclic number.

It is not a de Polignac number, because 65665150217 - 2⁶ = 65665150153 is a prime.

It is not a weakly prime, because it can be changed into another prime (65665150237) 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, 32832575108 + 32832575109.

It is an arithmetic number, because the mean of its divisors is an integer number (32832575109).

Almost surely, 2^65665150217 is an apocalyptic number.

It is an amenable number.

65665150217 is a deficient number, since it is larger than the sum of its proper divisors (1).

65665150217 is an equidigital number, since it uses as much as digits as its factorization.

65665150217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 65665150217 in words is "sixty-five billion, six hundred sixty-five million, one hundred fifty thousand, two hundred seventeen".