665313717593 has 16 divisors (see below), whose sum is σ = 760862269440. Its totient is φ = 569891264976.

The previous prime is 665313717557. The next prime is 665313717613. The reversal of 665313717593 is 395717313566.

It is a cyclic number.

It is not a de Polignac number, because 665313717593 - 2¹⁰ = 665313716569 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (665313717293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132030368 + ... + 132035406.

It is an arithmetic number, because the mean of its divisors is an integer number (47553891840).

Almost surely, 2^665313717593 is an apocalyptic number.

It is an amenable number.

665313717593 is a deficient number, since it is larger than the sum of its proper divisors (95548551847).

665313717593 is a wasteful number, since it uses less digits than its factorization.

665313717593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13796.

The product of its digits is 10716300, while the sum is 56.

The spelling of 665313717593 in words is "six hundred sixty-five billion, three hundred thirteen million, seven hundred seventeen thousand, five hundred ninety-three".