6675421 has 4 divisors (see below), whose sum is σ = 6760000. Its totient is φ = 6590844.

The previous prime is 6675397. The next prime is 6675433. The reversal of 6675421 is 1245766.

It is a happy number.

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 6675421 - 2¹³ = 6667229 is a prime.

It is a super-2 number, since 2×6675421² = 89122491054482, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6 + 6⁴ + 7⁴ + 5⁹ + 4¹¹ + 2¹⁹ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6673421) 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, 42171 + ... + 42328.

It is an arithmetic number, because the mean of its divisors is an integer number (1690000).

Almost surely, 2^6675421 is an apocalyptic number.

It is an amenable number.

6675421 is a deficient number, since it is larger than the sum of its proper divisors (84579).

6675421 is an equidigital number, since it uses as much as digits as its factorization.

6675421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84578.

The product of its digits is 10080, while the sum is 31.

The square root of 6675421 is about 2583.6836106613. The cubic root of 6675421 is about 188.2895511735.

The spelling of 6675421 in words is "six million, six hundred seventy-five thousand, four hundred twenty-one".