6553663 has 2 divisors, whose sum is σ = 6553664. Its totient is φ = 6553662.

The previous prime is 6553621. The next prime is 6553733. The reversal of 6553663 is 3663556.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6553663 - 2¹³ = 6545471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6553363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3276831 + 3276832.

It is an arithmetic number, because the mean of its divisors is an integer number (3276832).

Almost surely, 2^6553663 is an apocalyptic number.

6553663 is a deficient number, since it is larger than the sum of its proper divisors (1).

6553663 is an equidigital number, since it uses as much as digits as its factorization.

6553663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 34.

The square root of 6553663 is about 2560.0123046579. The cubic root of 6553663 is about 187.1377348958.

The spelling of 6553663 in words is "six million, five hundred fifty-three thousand, six hundred sixty-three".