665513315566 has 24 divisors (see below), whose sum is σ = 1120618185120. Its totient is φ = 296069748480.

The previous prime is 665513315501. The next prime is 665513315633.

665513315566 is nontrivially palindromic in base 10.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29244531 + ... + 29267278.

It is an arithmetic number, because the mean of its divisors is an integer number (46692424380).

Almost surely, 2^665513315566 is an apocalyptic number.

665513315566 is a deficient number, since it is larger than the sum of its proper divisors (455104869554).

665513315566 is a wasteful number, since it uses less digits than its factorization.

665513315566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58511880 (or 58511869 counting only the distinct ones).

The product of its digits is 7290000, while the sum is 52.

The spelling of 665513315566 in words is "six hundred sixty-five billion, five hundred thirteen million, three hundred fifteen thousand, five hundred sixty-six".