565941663 has 12 divisors (see below), whose sum is σ = 934253008. Its totient is φ = 323395200.

The previous prime is 565941659. The next prime is 565941689. The reversal of 565941663 is 366149565.

565941663 is a `hidden beast` number, since 56 + 594 + 1 + 6 + 6 + 3 = 666.

It is not a de Polignac number, because 565941663 - 2² = 565941659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565941863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4491538 + ... + 4491663.

Almost surely, 2^565941663 is an apocalyptic number.

565941663 is a deficient number, since it is larger than the sum of its proper divisors (368311345).

565941663 is a wasteful number, since it uses less digits than its factorization.

565941663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8983214 (or 8983211 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 565941663 is about 23789.5284316440. The cubic root of 565941663 is about 827.1619636510.

The spelling of 565941663 in words is "five hundred sixty-five million, nine hundred forty-one thousand, six hundred sixty-three".