6613668 has 18 divisors (see below), whose sum is σ = 16717974. Its totient is φ = 2204544.

The previous prime is 6613631. The next prime is 6613753. The reversal of 6613668 is 8663166.

It can be written as a sum of positive squares in only one way, i.e., 6594624 + 19044 = 2568^2 + 138^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 183713 = 6613668 / (6 + 6 + 1 + 3 + 6 + 6 + 8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91821 + ... + 91892.

Almost surely, 2^6613668 is an apocalyptic number.

It is an amenable number.

6613668 is an abundant number, since it is smaller than the sum of its proper divisors (10104306).

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

6613668 is a wasteful number, since it uses less digits than its factorization.

6613668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183723 (or 183718 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 6613668 is about 2571.7052708271. The cubic root of 6613668 is about 187.7071417413.

The spelling of 6613668 in words is "six million, six hundred thirteen thousand, six hundred sixty-eight".