6630909 has 4 divisors (see below), whose sum is σ = 8841216. Its totient is φ = 4420604.

The previous prime is 6630907. The next prime is 6630913. The reversal of 6630909 is 9090366.

6630909 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6630909 - 2¹ = 6630907 is a prime.

It is a D-number.

6630909 is a modest number, since divided by 909 gives 663 as remainder.

6630909 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6630909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6630907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1105149 + ... + 1105154.

It is an arithmetic number, because the mean of its divisors is an integer number (2210304).

Almost surely, 2^6630909 is an apocalyptic number.

It is an amenable number.

6630909 is a deficient number, since it is larger than the sum of its proper divisors (2210307).

6630909 is a wasteful number, since it uses less digits than its factorization.

6630909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210306.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 6630909 is about 2575.0551450406. The cubic root of 6630909 is about 187.8701098413.

The spelling of 6630909 in words is "six million, six hundred thirty thousand, nine hundred nine".