663592580081 has 4 divisors (see below), whose sum is σ = 663594209700. Its totient is φ = 663590950464.

The previous prime is 663592580071. The next prime is 663592580087. The reversal of 663592580081 is 180085295366.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 480886771600 + 182705808481 = 693460^2 + 427441^2 .

It is a cyclic number.

It is not a de Polignac number, because 663592580081 - 2¹⁰ = 663592579057 is a prime.

It is a super-2 number, since 2×663592580081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663592580087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380525 + ... + 1213253.

It is an arithmetic number, because the mean of its divisors is an integer number (165898552425).

Almost surely, 2^663592580081 is an apocalyptic number.

It is an amenable number.

663592580081 is a deficient number, since it is larger than the sum of its proper divisors (1629619).

663592580081 is an equidigital number, since it uses as much as digits as its factorization.

663592580081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629618.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 663592580081 in words is "six hundred sixty-three billion, five hundred ninety-two million, five hundred eighty thousand, eighty-one".