66665580283748 has 12 divisors (see below), whose sum is σ = 116853238466160. Its totient is φ = 33278940721992.

The previous prime is 66665580283711. The next prime is 66665580283781. The reversal of 66665580283748 is 84738208556666.

It is a happy number.

66665580283748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 13462352186 + ... + 13462357137.

It is an arithmetic number, because the mean of its divisors is an integer number (9737769872180).

Almost surely, 2^{66665580283748} is an apocalyptic number.

It is an amenable number.

66665580283748 is a deficient number, since it is larger than the sum of its proper divisors (50187658182412).

66665580283748 is a wasteful number, since it uses less digits than its factorization.

66665580283748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26924709946 (or 26924709944 counting only the distinct ones).

The product of its (nonzero) digits is 2786918400, while the sum is 74.

The spelling of 66665580283748 in words is "sixty-six trillion, six hundred sixty-five billion, five hundred eighty million, two hundred eighty-three thousand, seven hundred forty-eight".