66874320718 has 16 divisors (see below), whose sum is σ = 101460023280. Its totient is φ = 33054472000.

The previous prime is 66874320677. The next prime is 66874320727. The reversal of 66874320718 is 81702347866.

It is a congruent number.

It is an unprimeable number.

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, 861888 + ... + 936268.

It is an arithmetic number, because the mean of its divisors is an integer number (6341251455).

Almost surely, 2^66874320718 is an apocalyptic number.

66874320718 is a deficient number, since it is larger than the sum of its proper divisors (34585702562).

66874320718 is a wasteful number, since it uses less digits than its factorization.

66874320718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79523.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 66874320718 in words is "sixty-six billion, eight hundred seventy-four million, three hundred twenty thousand, seven hundred eighteen".