6499663 has 2 divisors, whose sum is σ = 6499664. Its totient is φ = 6499662.

The previous prime is 6499651. The next prime is 6499667. The reversal of 6499663 is 3669946.

6499663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6499663 - 2⁵ = 6499631 is a prime.

It is a super-2 number, since 2×6499663² = 84491238227138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6499667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3249831 + 3249832.

It is an arithmetic number, because the mean of its divisors is an integer number (3249832).

Almost surely, 2^6499663 is an apocalyptic number.

6499663 is a deficient number, since it is larger than the sum of its proper divisors (1).

6499663 is an equidigital number, since it uses as much as digits as its factorization.

6499663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 43.

The square root of 6499663 is about 2549.4436648022. The cubic root of 6499663 is about 186.6223325127.

The spelling of 6499663 in words is "six million, four hundred ninety-nine thousand, six hundred sixty-three".