6663385 has 8 divisors (see below), whose sum is σ = 8011080. Its totient is φ = 5320704.

The previous prime is 6663383. The next prime is 6663389. The reversal of 6663385 is 5833666.

6663385 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in 4 ways, for example, as 373321 + 6290064 = 611^2 + 2508^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6663385 - 2¹ = 6663383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6663383) 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 7 ways as a sum of consecutive naturals, for example, 2979 + ... + 4711.

It is an arithmetic number, because the mean of its divisors is an integer number (1001385).

Almost surely, 2^6663385 is an apocalyptic number.

It is an amenable number.

6663385 is a deficient number, since it is larger than the sum of its proper divisors (1347695).

6663385 is a wasteful number, since it uses less digits than its factorization.

6663385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507.

The product of its digits is 77760, while the sum is 37.

The square root of 6663385 is about 2581.3533272297. The cubic root of 6663385 is about 188.1763190420.

The spelling of 6663385 in words is "six million, six hundred sixty-three thousand, three hundred eighty-five".