566856840 has 128 divisors (see below), whose sum is σ = 1964373120. Its totient is φ = 129331200.

The previous prime is 566856809. The next prime is 566856841. The reversal of 566856840 is 48658665.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 566856840.

It is not an unprimeable number, because it can be changed into a prime (566856841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9810 + ... + 35070.

It is an arithmetic number, because the mean of its divisors is an integer number (15346665).

Almost surely, 2^566856840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 566856840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982186560).

566856840 is an abundant number, since it is smaller than the sum of its proper divisors (1397516280).

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

566856840 is a wasteful number, since it uses less digits than its factorization.

566856840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25303 (or 25299 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 48.

The square root of 566856840 is about 23808.7555323667. The cubic root of 566856840 is about 827.6075878648.

The spelling of 566856840 in words is "five hundred sixty-six million, eight hundred fifty-six thousand, eight hundred forty".