6679221 has 4 divisors (see below), whose sum is σ = 8905632. Its totient is φ = 4452812.

The previous prime is 6679199. The next prime is 6679237. The reversal of 6679221 is 1229766.

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 6679221 - 2⁶ = 6679157 is a prime.

It is a super-2 number, since 2×6679221² = 89223986333682, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6679271) 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, 1113201 + ... + 1113206.

It is an arithmetic number, because the mean of its divisors is an integer number (2226408).

Almost surely, 2^6679221 is an apocalyptic number.

It is an amenable number.

6679221 is a deficient number, since it is larger than the sum of its proper divisors (2226411).

6679221 is a wasteful number, since it uses less digits than its factorization.

6679221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226410.

The product of its digits is 9072, while the sum is 33.

The square root of 6679221 is about 2584.4188901956. The cubic root of 6679221 is about 188.3252724946.

The spelling of 6679221 in words is "six million, six hundred seventy-nine thousand, two hundred twenty-one".