71066566717 has 8 divisors (see below), whose sum is σ = 72697049856. Its totient is φ = 69441018192.

The previous prime is 71066566699. The next prime is 71066566789. The reversal of 71066566717 is 71766566017.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71066566717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71066566817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1204513 + ... + 1262134.

It is an arithmetic number, because the mean of its divisors is an integer number (9087131232).

Almost surely, 2^71066566717 is an apocalyptic number.

It is an amenable number.

71066566717 is a deficient number, since it is larger than the sum of its proper divisors (1630483139).

71066566717 is a wasteful number, since it uses less digits than its factorization.

71066566717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467307.

The product of its (nonzero) digits is 2222640, while the sum is 52.

The spelling of 71066566717 in words is "seventy-one billion, sixty-six million, five hundred sixty-six thousand, seven hundred seventeen".