6663138 has 8 divisors (see below), whose sum is σ = 13326288. Its totient is φ = 2221044.

The previous prime is 6663121. The next prime is 6663179. The reversal of 6663138 is 8313666.

It is a sphenic number, since it is the product of 3 distinct primes.

6663138 is an admirable number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6663099 and 6663108.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 555256 + ... + 555267.

It is an arithmetic number, because the mean of its divisors is an integer number (1665786).

Almost surely, 2^6663138 is an apocalyptic number.

6663138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6663138 is a wasteful number, since it uses less digits than its factorization.

6663138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110528.

The product of its digits is 15552, while the sum is 33.

The square root of 6663138 is about 2581.3054836652. The cubic root of 6663138 is about 188.1739938912.

The spelling of 6663138 in words is "six million, six hundred sixty-three thousand, one hundred thirty-eight".