216066671665617 has 16 divisors (see below), whose sum is σ = 290364530456000. Its totient is φ = 142908080704704.

The previous prime is 216066671665573. The next prime is 216066671665627. The reversal of 216066671665617 is 716566176660612.

It is a de Polignac number, because none of the positive numbers 2^k-216066671665617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216066671665627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180700642 + ... + 181892427.

It is an arithmetic number, because the mean of its divisors is an integer number (18147783153500).

Almost surely, 2^{216066671665617} is an apocalyptic number.

It is an amenable number.

216066671665617 is a deficient number, since it is larger than the sum of its proper divisors (74297858790383).

216066671665617 is a wasteful number, since it uses less digits than its factorization.

216066671665617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362594640.

The product of its (nonzero) digits is 137168640, while the sum is 66.

The spelling of 216066671665617 in words is "two hundred sixteen trillion, sixty-six billion, six hundred seventy-one million, six hundred sixty-five thousand, six hundred seventeen".