566641 has 4 divisors (see below), whose sum is σ = 573552. Its totient is φ = 559732.

The previous prime is 566639. The next prime is 566653. The reversal of 566641 is 146665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146665 = 5 ⋅29333.

It is a cyclic number.

It is not a de Polignac number, because 566641 - 2¹ = 566639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (566681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3331 + ... + 3496.

It is an arithmetic number, because the mean of its divisors is an integer number (143388).

2⁵⁶⁶⁶⁴¹ is an apocalyptic number.

It is an amenable number.

566641 is a deficient number, since it is larger than the sum of its proper divisors (6911).

566641 is an equidigital number, since it uses as much as digits as its factorization.

566641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6910.

The product of its digits is 4320, while the sum is 28.

The square root of 566641 is about 752.7556044295. The cubic root of 566641 is about 82.7502532828.

It can be divided in two parts, 56664 and 1, that added together give a palindrome (56665).

The spelling of 566641 in words is "five hundred sixty-six thousand, six hundred forty-one".