6700221 has 12 divisors (see below), whose sum is σ = 10558080. Its totient is φ = 4060680.

The previous prime is 6700171. The next prime is 6700231. The reversal of 6700221 is 1220076.

It is a happy number.

It is not a de Polignac number, because 6700221 - 2⁶ = 6700157 is a prime.

It is a super-2 number, since 2×6700221² = 89785922897682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6700194 and 6700203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6700231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33741 + ... + 33938.

It is an arithmetic number, because the mean of its divisors is an integer number (879840).

Almost surely, 2^6700221 is an apocalyptic number.

It is an amenable number.

6700221 is a deficient number, since it is larger than the sum of its proper divisors (3857859).

6700221 is a wasteful number, since it uses less digits than its factorization.

6700221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67696 (or 67693 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 6700221 is about 2588.4785106313. The cubic root of 6700221 is about 188.5224358654.

Adding to 6700221 its reverse (1220076), we get a palindrome (7920297).

The spelling of 6700221 in words is "six million, seven hundred thousand, two hundred twenty-one".