6556369 has 2 divisors, whose sum is σ = 6556370. Its totient is φ = 6556368.

The previous prime is 6556367. The next prime is 6556393. The reversal of 6556369 is 9636556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6066369 + 490000 = 2463^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 6556369 - 2¹ = 6556367 is a prime.

It is a super-2 number, since 2×6556369² = 85971948928322, which contains 22 as substring.

Together with 6556367, it forms a pair of twin primes.

6556369 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6556367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278184 + 3278185.

It is an arithmetic number, because the mean of its divisors is an integer number (3278185).

Almost surely, 2^6556369 is an apocalyptic number.

It is an amenable number.

6556369 is a deficient number, since it is larger than the sum of its proper divisors (1).

6556369 is an equidigital number, since it uses as much as digits as its factorization.

6556369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 40.

The square root of 6556369 is about 2560.5407631983. The cubic root of 6556369 is about 187.1634876710.

The spelling of 6556369 in words is "six million, five hundred fifty-six thousand, three hundred sixty-nine".