6618489 has 4 divisors (see below), whose sum is σ = 8824656. Its totient is φ = 4412324.

The previous prime is 6618487. The next prime is 6618497. The reversal of 6618489 is 9848166.

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 6618489 - 2¹ = 6618487 is a prime.

It is an Ulam number.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 6618489.

It is not an unprimeable number, because it can be changed into a prime (6618487) 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, 1103079 + ... + 1103084.

It is an arithmetic number, because the mean of its divisors is an integer number (2206164).

Almost surely, 2^6618489 is an apocalyptic number.

It is an amenable number.

6618489 is a deficient number, since it is larger than the sum of its proper divisors (2206167).

6618489 is a wasteful number, since it uses less digits than its factorization.

6618489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206166.

The product of its digits is 82944, while the sum is 42.

The square root of 6618489 is about 2572.6424158829. The cubic root of 6618489 is about 187.7527400556.

The spelling of 6618489 in words is "six million, six hundred eighteen thousand, four hundred eighty-nine".