665065560566 has 8 divisors (see below), whose sum is σ = 1088289099144. Its totient is φ = 302302527520.

The previous prime is 665065560547. The next prime is 665065560581.

665065560566 is nontrivially palindromic in base 10.

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

It is a Curzon number.

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, 15115126355 + ... + 15115126398.

It is an arithmetic number, because the mean of its divisors is an integer number (136036137393).

Almost surely, 2^665065560566 is an apocalyptic number.

665065560566 is a deficient number, since it is larger than the sum of its proper divisors (423223538578).

665065560566 is a wasteful number, since it uses less digits than its factorization.

665065560566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30230252766.

The product of its (nonzero) digits is 29160000, while the sum is 56.

The spelling of 665065560566 in words is "six hundred sixty-five billion, sixty-five million, five hundred sixty thousand, five hundred sixty-six".