665845548566 has 8 divisors (see below), whose sum is σ = 1089565443144. Its totient is φ = 302657067520.

The previous prime is 665845548523. The next prime is 665845548601.

It is a happy number.

665845548566 is nontrivially palindromic in base 10.

665845548566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 665845548496 and 665845548505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15132853355 + ... + 15132853398.

It is an arithmetic number, because the mean of its divisors is an integer number (136195680393).

Almost surely, 2^665845548566 is an apocalyptic number.

665845548566 is a deficient number, since it is larger than the sum of its proper divisors (423719894578).

665845548566 is a wasteful number, since it uses less digits than its factorization.

665845548566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30265706766.

The product of its digits is 829440000, while the sum is 68.

The spelling of 665845548566 in words is "six hundred sixty-five billion, eight hundred forty-five million, five hundred forty-eight thousand, five hundred sixty-six".