565966764 has 120 divisors (see below), whose sum is σ = 1622174400. Its totient is φ = 170644320.

The previous prime is 565966759. The next prime is 565966781. The reversal of 565966764 is 467669565.

565966764 is a `hidden beast` number, since 565 + 9 + 6 + 6 + 76 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 565966764.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1350547 + ... + 1350965.

It is an arithmetic number, because the mean of its divisors is an integer number (13518120).

Almost surely, 2^565966764 is an apocalyptic number.

565966764 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 565966764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (811087200).

565966764 is an abundant number, since it is smaller than the sum of its proper divisors (1056207636).

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

565966764 is a wasteful number, since it uses less digits than its factorization.

565966764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 814 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 54.

The square root of 565966764 is about 23790.0559898458. The cubic root of 565966764 is about 827.1741924058.

The spelling of 565966764 in words is "five hundred sixty-five million, nine hundred sixty-six thousand, seven hundred sixty-four".