655664563 has 8 divisors (see below), whose sum is σ = 663536016. Its totient is φ = 647836800.

The previous prime is 655664561. The next prime is 655664573. The reversal of 655664563 is 365466556.

655664563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655664563 - 2¹ = 655664561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655664561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19783 + ... + 41263.

It is an arithmetic number, because the mean of its divisors is an integer number (82942002).

Almost surely, 2^655664563 is an apocalyptic number.

655664563 is a deficient number, since it is larger than the sum of its proper divisors (7871453).

655664563 is a wasteful number, since it uses less digits than its factorization.

655664563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21845.

The product of its digits is 1944000, while the sum is 46.

The square root of 655664563 is about 25605.9478051487. The cubic root of 655664563 is about 868.7481723268.

The spelling of 655664563 in words is "six hundred fifty-five million, six hundred sixty-four thousand, five hundred sixty-three".