6607221 has 4 divisors (see below), whose sum is σ = 8809632. Its totient is φ = 4404812.

The previous prime is 6607207. The next prime is 6607229. The reversal of 6607221 is 1227066.

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 a de Polignac number, because none of the positive numbers 2^k-6607221 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 6607191 and 6607200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6607229) 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, 1101201 + ... + 1101206.

It is an arithmetic number, because the mean of its divisors is an integer number (2202408).

Almost surely, 2^6607221 is an apocalyptic number.

It is an amenable number.

6607221 is a deficient number, since it is larger than the sum of its proper divisors (2202411).

6607221 is a wasteful number, since it uses less digits than its factorization.

6607221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202410.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 6607221 is about 2570.4515167573. The cubic root of 6607221 is about 187.6461296387.

The spelling of 6607221 in words is "six million, six hundred seven thousand, two hundred twenty-one".