6620205 has 32 divisors (see below), whose sum is σ = 11427840. Its totient is φ = 3263040.

The previous prime is 6620183. The next prime is 6620209. The reversal of 6620205 is 5020266.

It is not a de Polignac number, because 6620205 - 2⁹ = 6619693 is a prime.

It is a super-2 number, since 2×6620205² = 87654228484050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10386 + ... + 11004.

It is an arithmetic number, because the mean of its divisors is an integer number (357120).

Almost surely, 2^6620205 is an apocalyptic number.

It is an amenable number.

6620205 is a deficient number, since it is larger than the sum of its proper divisors (4807635).

6620205 is a wasteful number, since it uses less digits than its factorization.

6620205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 6620205 is about 2572.9759035016. The cubic root of 6620205 is about 187.7689651014.

The spelling of 6620205 in words is "six million, six hundred twenty thousand, two hundred five".