66022006217 has 2 divisors, whose sum is σ = 66022006218. Its totient is φ = 66022006216.

The previous prime is 66022006121. The next prime is 66022006273. The reversal of 66022006217 is 71260022066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42643902016 + 23378104201 = 206504^2 + 152899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66022006217 is a prime.

It is not a weakly prime, because it can be changed into another prime (66022006277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33011003108 + 33011003109.

It is an arithmetic number, because the mean of its divisors is an integer number (33011003109).

Almost surely, 2^66022006217 is an apocalyptic number.

It is an amenable number.

66022006217 is a deficient number, since it is larger than the sum of its proper divisors (1).

66022006217 is an equidigital number, since it uses as much as digits as its factorization.

66022006217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 66022006217 in words is "sixty-six billion, twenty-two million, six thousand, two hundred seventeen".