66072317580816 has 40 divisors (see below), whose sum is σ = 170687565058560. Its totient is φ = 22024009777536.

The previous prime is 66072317580793. The next prime is 66072317580833. The reversal of 66072317580816 is 61808571327066.

It is a self number, because there is not a number n which added to its sum of digits gives 66072317580816.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8574801 + ... + 14341263.

It is an arithmetic number, because the mean of its divisors is an integer number (4267189126464).

Almost surely, 2^{66072317580816} is an apocalyptic number.

It is an amenable number.

66072317580816 is an abundant number, since it is smaller than the sum of its proper divisors (104615247477744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66072317580816 is a wasteful number, since it uses less digits than its factorization.

66072317580816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6005183 (or 6005177 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 66072317580816 in words is "sixty-six trillion, seventy-two billion, three hundred seventeen million, five hundred eighty thousand, eight hundred sixteen".