66364782718 has 12 divisors (see below), whose sum is σ = 107793686088. Its totient is φ = 30629899560.

The previous prime is 66364782703. The next prime is 66364782727. The reversal of 66364782718 is 81728746366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98172418 + ... + 98173093.

It is an arithmetic number, because the mean of its divisors is an integer number (8982807174).

Almost surely, 2^66364782718 is an apocalyptic number.

66364782718 is a deficient number, since it is larger than the sum of its proper divisors (41428903370).

66364782718 is a wasteful number, since it uses less digits than its factorization.

66364782718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196345539 (or 196345526 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 58.

The spelling of 66364782718 in words is "sixty-six billion, three hundred sixty-four million, seven hundred eighty-two thousand, seven hundred eighteen".