565666772 has 36 divisors (see below), whose sum is σ = 1152112500. Its totient is φ = 241992960.

The previous prime is 565666771. The next prime is 565666793. The reversal of 565666772 is 277666565.

It can be written as a sum of positive squares in 2 ways, for example, as 225780676 + 339886096 = 15026^2 + 18436^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 565666772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565666771) 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, 26147 + ... + 42602.

It is an arithmetic number, because the mean of its divisors is an integer number (32003125).

Almost surely, 2^565666772 is an apocalyptic number.

It is an amenable number.

565666772 is an abundant number, since it is smaller than the sum of its proper divisors (586445728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

565666772 is a wasteful number, since it uses less digits than its factorization.

565666772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68792 (or 68779 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 50.

The square root of 565666772 is about 23783.7501668681. The cubic root of 565666772 is about 827.0280180410.

The spelling of 565666772 in words is "five hundred sixty-five million, six hundred sixty-six thousand, seven hundred seventy-two".