6560551 has 2 divisors, whose sum is σ = 6560552. Its totient is φ = 6560550.

The previous prime is 6560537. The next prime is 6560579. The reversal of 6560551 is 1550656.

It is an a-pointer prime, because the next prime (6560579) can be obtained adding 6560551 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6560551 - 2⁹ = 6560039 is a prime.

6560551 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6560531) 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 as a sum of consecutive naturals, namely, 3280275 + 3280276.

It is an arithmetic number, because the mean of its divisors is an integer number (3280276).

Almost surely, 2^6560551 is an apocalyptic number.

6560551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6560551 is an equidigital number, since it uses as much as digits as its factorization.

6560551 is an odious number, because the sum of its binary digits is odd.

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

The square root of 6560551 is about 2561.3572573930. The cubic root of 6560551 is about 187.2032734805.

It can be divided in two parts, 65605 and 51, that added together give a palindrome (65656).

The spelling of 6560551 in words is "six million, five hundred sixty thousand, five hundred fifty-one".