66382078205663 has 16 divisors (see below), whose sum is σ = 74991665882112. Its totient is φ = 58214071656000.

The previous prime is 66382078205659. The next prime is 66382078205669. The reversal of 66382078205663 is 36650287028366.

It is a cyclic number.

It is not a de Polignac number, because 66382078205663 - 2² = 66382078205659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66382078205596 and 66382078205605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66382078205669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310865873 + ... + 311079338.

It is an arithmetic number, because the mean of its divisors is an integer number (4686979117632).

Almost surely, 2^{66382078205663} is an apocalyptic number.

66382078205663 is a deficient number, since it is larger than the sum of its proper divisors (8609587676449).

66382078205663 is a wasteful number, since it uses less digits than its factorization.

66382078205663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621945566.

The product of its (nonzero) digits is 104509440, while the sum is 62.

The spelling of 66382078205663 in words is "sixty-six trillion, three hundred eighty-two billion, seventy-eight million, two hundred five thousand, six hundred sixty-three".