6621189 has 8 divisors (see below), whose sum is σ = 8843232. Its totient is φ = 4406640.

The previous prime is 6621163. The next prime is 6621191. The reversal of 6621189 is 9811266.

6621189 is nontrivially palindromic in base 6.

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

It is not a de Polignac number, because 6621189 - 2⁷ = 6621061 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6621119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694 + ... + 3704.

It is an arithmetic number, because the mean of its divisors is an integer number (1105404).

Almost surely, 2^6621189 is an apocalyptic number.

It is an amenable number.

6621189 is a deficient number, since it is larger than the sum of its proper divisors (2222043).

6621189 is a wasteful number, since it uses less digits than its factorization.

6621189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3747.

The product of its digits is 5184, while the sum is 33.

The square root of 6621189 is about 2573.1671146663. The cubic root of 6621189 is about 187.7782677090.

The spelling of 6621189 in words is "six million, six hundred twenty-one thousand, one hundred eighty-nine".