564420665 has 8 divisors (see below), whose sum is σ = 678275208. Its totient is φ = 450889600.

The previous prime is 564420653. The next prime is 564420671. The reversal of 564420665 is 566024465.

564420665 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 148913209 + 415507456 = 12203^2 + 20384^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 564420665 - 2¹⁸ = 564158521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 77012 + ... + 84021.

It is an arithmetic number, because the mean of its divisors is an integer number (84784401).

Almost surely, 2^564420665 is an apocalyptic number.

It is an amenable number.

564420665 is a deficient number, since it is larger than the sum of its proper divisors (113854543).

564420665 is a wasteful number, since it uses less digits than its factorization.

564420665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161739.

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 564420665 is about 23757.5391191933. The cubic root of 564420665 is about 826.4202850523.

The spelling of 564420665 in words is "five hundred sixty-four million, four hundred twenty thousand, six hundred sixty-five".