6697221 has 8 divisors (see below), whose sum is σ = 8944320. Its totient is φ = 4457472.

The previous prime is 6697219. The next prime is 6697241. The reversal of 6697221 is 1227966.

6697221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6697221 - 2¹ = 6697219 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6697241) 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, 856 + ... + 3758.

It is an arithmetic number, because the mean of its divisors is an integer number (1118040).

Almost surely, 2^6697221 is an apocalyptic number.

It is an amenable number.

6697221 is a deficient number, since it is larger than the sum of its proper divisors (2247099).

6697221 is a wasteful number, since it uses less digits than its factorization.

6697221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3675.

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

The square root of 6697221 is about 2587.8989547507. The cubic root of 6697221 is about 188.4942949161.

The spelling of 6697221 in words is "six million, six hundred ninety-seven thousand, two hundred twenty-one".