566551 has 2 divisors, whose sum is σ = 566552. Its totient is φ = 566550.

The previous prime is 566549. The next prime is 566557. The reversal of 566551 is 155665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 566551 - 2¹ = 566549 is a prime.

Together with 566549, it forms a pair of twin primes.

566551 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283275 + 283276.

It is an arithmetic number, because the mean of its divisors is an integer number (283276).

2⁵⁶⁶⁵⁵¹ is an apocalyptic number.

566551 is a deficient number, since it is larger than the sum of its proper divisors (1).

566551 is an equidigital number, since it uses as much as digits as its factorization.

566551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500, while the sum is 28.

The square root of 566551 is about 752.6958216969. The cubic root of 566551 is about 82.7458719566.

The spelling of 566551 in words is "five hundred sixty-six thousand, five hundred fifty-one".