6630138 has 24 divisors (see below), whose sum is σ = 14421108. Its totient is φ = 2201472.

The previous prime is 6630137. The next prime is 6630157. The reversal of 6630138 is 8310366.

It can be written as a sum of positive squares in 2 ways, for example, as 6335289 + 294849 = 2517^2 + 543^2 .

It is not an unprimeable number, because it can be changed into a prime (6630131) 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 in 11 ways as a sum of consecutive naturals, for example, 5520 + ... + 6612.

Almost surely, 2^6630138 is an apocalyptic number.

6630138 is an abundant number, since it is smaller than the sum of its proper divisors (7790970).

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

6630138 is a wasteful number, since it uses less digits than its factorization.

6630138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 6630138 is about 2574.9054351568. The cubic root of 6630138 is about 187.8628281112.

The spelling of 6630138 in words is "six million, six hundred thirty thousand, one hundred thirty-eight".