6630685 has 4 divisors (see below), whose sum is σ = 7956828. Its totient is φ = 5304544.

The previous prime is 6630661. The next prime is 6630691. The reversal of 6630685 is 5860366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3437316 + 3193369 = 1854^2 + 1787^2 .

It is a cyclic number.

It is not a de Polignac number, because 6630685 - 2⁵ = 6630653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6630685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663064 + ... + 663073.

It is an arithmetic number, because the mean of its divisors is an integer number (1989207).

Almost surely, 2^6630685 is an apocalyptic number.

It is an amenable number.

6630685 is a deficient number, since it is larger than the sum of its proper divisors (1326143).

6630685 is a wasteful number, since it uses less digits than its factorization.

6630685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326142.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 6630685 is about 2575.0116504591. The cubic root of 6630685 is about 187.8679943255.

The spelling of 6630685 in words is "six million, six hundred thirty thousand, six hundred eighty-five".