6605220 has 48 divisors (see below), whose sum is σ = 18607680. Its totient is φ = 1750656.

The previous prime is 6605219. The next prime is 6605237. The reversal of 6605220 is 225066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16786 + ... + 17174.

It is an arithmetic number, because the mean of its divisors is an integer number (387660).

Almost surely, 2^6605220 is an apocalyptic number.

6605220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6605220 is an abundant number, since it is smaller than the sum of its proper divisors (12002460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6605220 is a wasteful number, since it uses less digits than its factorization.

6605220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 682 counting only the distinct ones).

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

The square root of 6605220 is about 2570.0622560553. The cubic root of 6605220 is about 187.6271848197.

The spelling of 6605220 in words is "six million, six hundred five thousand, two hundred twenty".