66517913318 has 16 divisors (see below), whose sum is σ = 100653905664. Its totient is φ = 32967330240.

The previous prime is 66517913291. The next prime is 66517913323. The reversal of 66517913318 is 81331971566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6203 + ... + 364793.

It is an arithmetic number, because the mean of its divisors is an integer number (6290869104).

Almost surely, 2^66517913318 is an apocalyptic number.

66517913318 is a deficient number, since it is larger than the sum of its proper divisors (34135992346).

66517913318 is a wasteful number, since it uses less digits than its factorization.

66517913318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359407.

The product of its digits is 816480, while the sum is 50.

The spelling of 66517913318 in words is "sixty-six billion, five hundred seventeen million, nine hundred thirteen thousand, three hundred eighteen".