565669 has 8 divisors (see below), whose sum is σ = 621432. Its totient is φ = 511680.

The previous prime is 565667. The next prime is 565723. The reversal of 565669 is 966565.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21025 + 544644 = 145^2 + 738^2 .

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

It is not a de Polignac number, because 565669 - 2¹ = 565667 is a prime.

It is a super-2 number, since 2×565669² = 639962835122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279 + ... + 1099.

It is an arithmetic number, because the mean of its divisors is an integer number (77679).

2⁵⁶⁵⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

565669 is a deficient number, since it is larger than the sum of its proper divisors (55763).

565669 is a wasteful number, since it uses less digits than its factorization.

565669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887.

The product of its digits is 48600, while the sum is 37.

The square root of 565669 is about 752.1096994455. The cubic root of 565669 is about 82.7029103849.

The spelling of 565669 in words is "five hundred sixty-five thousand, six hundred sixty-nine".