665080405563 has 16 divisors (see below), whose sum is σ = 1017881434880. Its totient is φ = 378386354016.

The previous prime is 665080405543. The next prime is 665080405597. The reversal of 665080405563 is 365504080566.

It is not a de Polignac number, because 665080405563 - 2⁵ = 665080405531 is a prime.

It is a super-2 number, since 2×665080405563² (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 (665080405513) 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, 69144745 + ... + 69154362.

It is an arithmetic number, because the mean of its divisors is an integer number (63617589680).

Almost surely, 2^665080405563 is an apocalyptic number.

665080405563 is a deficient number, since it is larger than the sum of its proper divisors (352801029317).

665080405563 is a wasteful number, since it uses less digits than its factorization.

665080405563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138299346.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 665080405563 in words is "six hundred sixty-five billion, eighty million, four hundred five thousand, five hundred sixty-three".