560991663 has 40 divisors (see below), whose sum is σ = 890947200. Its totient is φ = 350771472.

The previous prime is 560991637. The next prime is 560991677. The reversal of 560991663 is 366199065.

It is not a de Polignac number, because 560991663 - 2²⁵ = 527437231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (560993663) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 156748 + ... + 160286.

It is an arithmetic number, because the mean of its divisors is an integer number (22273680).

Almost surely, 2^560991663 is an apocalyptic number.

560991663 is a deficient number, since it is larger than the sum of its proper divisors (329955537).

560991663 is a wasteful number, since it uses less digits than its factorization.

560991663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673 (or 3664 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 560991663 is about 23685.2625697922. The cubic root of 560991663 is about 824.7433118786.

The spelling of 560991663 in words is "five hundred sixty million, nine hundred ninety-one thousand, six hundred sixty-three".