66024240064217 has 2 divisors, whose sum is σ = 66024240064218. Its totient is φ = 66024240064216.

The previous prime is 66024240064193. The next prime is 66024240064291. The reversal of 66024240064217 is 71246004242066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48261142456576 + 17763097607641 = 6947024^2 + 4214629^2 .

It is a cyclic number.

It is not a de Polignac number, because 66024240064217 - 2⁸ = 66024240063961 is a prime.

It is not a weakly prime, because it can be changed into another prime (66024240061217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33012120032108 + 33012120032109.

It is an arithmetic number, because the mean of its divisors is an integer number (33012120032109).

Almost surely, 2^{66024240064217} is an apocalyptic number.

It is an amenable number.

66024240064217 is a deficient number, since it is larger than the sum of its proper divisors (1).

66024240064217 is an equidigital number, since it uses as much as digits as its factorization.

66024240064217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 44.

The spelling of 66024240064217 in words is "sixty-six trillion, twenty-four billion, two hundred forty million, sixty-four thousand, two hundred seventeen".