2066650817017 has 4 divisors (see below), whose sum is σ = 2086715388160. Its totient is φ = 2046586245876.

The previous prime is 2066650816999. The next prime is 2066650817041. The reversal of 2066650817017 is 7107180566602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2066650817017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066650818017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10032285417 + ... + 10032285622.

It is an arithmetic number, because the mean of its divisors is an integer number (521678847040).

Almost surely, 2^{2066650817017} is an apocalyptic number.

It is an amenable number.

2066650817017 is a deficient number, since it is larger than the sum of its proper divisors (20064571143).

2066650817017 is a wasteful number, since it uses less digits than its factorization.

2066650817017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20064571142.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 2066650817017 in words is "two trillion, sixty-six billion, six hundred fifty million, eight hundred seventeen thousand, seventeen".