565061663 has 4 divisors (see below), whose sum is σ = 565500648. Its totient is φ = 564622680.

The previous prime is 565061639. The next prime is 565061687. The reversal of 565061663 is 366160565.

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

It is an interprime number because it is at equal distance from previous prime (565061639) and next prime (565061687).

It is a cyclic number.

It is not a de Polignac number, because 565061663 - 2⁸ = 565061407 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 (565061603) 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, 217556 + ... + 220137.

It is an arithmetic number, because the mean of its divisors is an integer number (141375162).

Almost surely, 2^565061663 is an apocalyptic number.

565061663 is a deficient number, since it is larger than the sum of its proper divisors (438985).

565061663 is a wasteful number, since it uses less digits than its factorization.

565061663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438984.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 565061663 is about 23771.0257035745. The cubic root of 565061663 is about 826.7330147674.

The spelling of 565061663 in words is "five hundred sixty-five million, sixty-one thousand, six hundred sixty-three".