664586427563 has 4 divisors (see below), whose sum is σ = 664589088240. Its totient is φ = 664583766888.

The previous prime is 664586427497. The next prime is 664586427577. The reversal of 664586427563 is 365724685466.

664586427563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664586427563 - 2³⁰ = 663512685739 is a prime.

It is a super-2 number, since 2×664586427563² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664586427496 and 664586427505.

It is not an unprimeable number, because it can be changed into a prime (664586423563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911768 + ... + 1469861.

It is an arithmetic number, because the mean of its divisors is an integer number (166147272060).

Almost surely, 2^664586427563 is an apocalyptic number.

664586427563 is a deficient number, since it is larger than the sum of its proper divisors (2660677).

664586427563 is a wasteful number, since it uses less digits than its factorization.

664586427563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660676.

The product of its digits is 174182400, while the sum is 62.

The spelling of 664586427563 in words is "six hundred sixty-four billion, five hundred eighty-six million, four hundred twenty-seven thousand, five hundred sixty-three".