6663489 has 16 divisors (see below), whose sum is σ = 10278912. Its totient is φ = 3760848.

The previous prime is 6663487. The next prime is 6663493. The reversal of 6663489 is 9843666.

It is not a de Polignac number, because 6663489 - 2¹ = 6663487 is a prime.

6663489 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6663489.

It is not an unprimeable number, because it can be changed into a prime (6663487) 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 in 15 ways as a sum of consecutive naturals, for example, 169 + ... + 3654.

It is an arithmetic number, because the mean of its divisors is an integer number (642432).

Almost surely, 2^6663489 is an apocalyptic number.

It is an amenable number.

6663489 is a deficient number, since it is larger than the sum of its proper divisors (3615423).

6663489 is a wasteful number, since it uses less digits than its factorization.

6663489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3916.

The product of its digits is 186624, while the sum is 42.

The square root of 6663489 is about 2581.3734716232. The cubic root of 6663489 is about 188.1772980356.

The spelling of 6663489 in words is "six million, six hundred sixty-three thousand, four hundred eighty-nine".