20066163607817 has 2 divisors, whose sum is σ = 20066163607818. Its totient is φ = 20066163607816.

The previous prime is 20066163607801. The next prime is 20066163607823. The reversal of 20066163607817 is 71870636166002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17757635868361 + 2308527739456 = 4213981^2 + 1519384^2 .

It is a cyclic number.

It is not a de Polignac number, because 20066163607817 - 2⁴ = 20066163607801 is a prime.

It is a zygodrome in base 8.

It is not a weakly prime, because it can be changed into another prime (20066163607837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10033081803908 + 10033081803909.

It is an arithmetic number, because the mean of its divisors is an integer number (10033081803909).

Almost surely, 2^{20066163607817} is an apocalyptic number.

It is an amenable number.

20066163607817 is a deficient number, since it is larger than the sum of its proper divisors (1).

20066163607817 is an equidigital number, since it uses as much as digits as its factorization.

20066163607817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 20066163607817 in words is "twenty trillion, sixty-six billion, one hundred sixty-three million, six hundred seven thousand, eight hundred seventeen".