6618689 has 16 divisors (see below), whose sum is σ = 8448000. Its totient is φ = 5034960.

The previous prime is 6618659. The next prime is 6618701. The reversal of 6618689 is 9868166.

It is not a de Polignac number, because 6618689 - 2⁸ = 6618433 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (6618659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2312 + ... + 4310.

It is an arithmetic number, because the mean of its divisors is an integer number (528000).

Almost surely, 2^6618689 is an apocalyptic number.

It is an amenable number.

6618689 is a deficient number, since it is larger than the sum of its proper divisors (1829311).

6618689 is a wasteful number, since it uses less digits than its factorization.

6618689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060.

The product of its digits is 124416, while the sum is 44.

The square root of 6618689 is about 2572.6812861293. The cubic root of 6618689 is about 187.7546312310.

The spelling of 6618689 in words is "six million, six hundred eighteen thousand, six hundred eighty-nine".