6684621 has 8 divisors (see below), whose sum is σ = 9437184. Its totient is φ = 4194240.

The previous prime is 6684607. The next prime is 6684631. The reversal of 6684621 is 1264866.

It is a happy number.

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

It is not a de Polignac number, because 6684621 - 2⁷ = 6684493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6684631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65485 + ... + 65586.

It is an arithmetic number, because the mean of its divisors is an integer number (1179648).

Almost surely, 2^6684621 is an apocalyptic number.

It is an amenable number.

6684621 is a deficient number, since it is larger than the sum of its proper divisors (2752563).

6684621 is a wasteful number, since it uses less digits than its factorization.

6684621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131091.

The product of its digits is 13824, while the sum is 33.

The square root of 6684621 is about 2585.4634014041. The cubic root of 6684621 is about 188.3760110729.

The spelling of 6684621 in words is "six million, six hundred eighty-four thousand, six hundred twenty-one".