665882288566 has 16 divisors (see below), whose sum is σ = 1090278484560. Its totient is φ = 302492400480.

The previous prime is 665882288543. The next prime is 665882288623.

665882288566 is nontrivially palindromic in base 10.

665882288566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 665882288495 and 665882288504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9030801 + ... + 9104236.

It is an arithmetic number, because the mean of its divisors is an integer number (68142405285).

Almost surely, 2^665882288566 is an apocalyptic number.

665882288566 is a deficient number, since it is larger than the sum of its proper divisors (424396195994).

665882288566 is a wasteful number, since it uses less digits than its factorization.

665882288566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18136719.

The product of its digits is 530841600, while the sum is 70.

The spelling of 665882288566 in words is "six hundred sixty-five billion, eight hundred eighty-two million, two hundred eighty-eight thousand, five hundred sixty-six".