6696221 has 8 divisors (see below), whose sum is σ = 7670400. Its totient is φ = 5726448.

The previous prime is 6696169. The next prime is 6696229. The reversal of 6696221 is 1226966.

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

It is a de Polignac number, because none of the positive numbers 2^k-6696221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6696229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3395 + ... + 4991.

It is an arithmetic number, because the mean of its divisors is an integer number (958800).

Almost surely, 2^6696221 is an apocalyptic number.

It is an amenable number.

6696221 is a deficient number, since it is larger than the sum of its proper divisors (974179).

6696221 is a wasteful number, since it uses less digits than its factorization.

6696221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203.

The product of its digits is 7776, while the sum is 32.

The square root of 6696221 is about 2587.7057406127. The cubic root of 6696221 is about 188.4849127322.

The spelling of 6696221 in words is "six million, six hundred ninety-six thousand, two hundred twenty-one".