6635220 has 24 divisors (see below), whose sum is σ = 18578784. Its totient is φ = 1769376.

The previous prime is 6635179. The next prime is 6635221. The reversal of 6635220 is 225366.

It is a super-2 number, since 2×6635220² = 88052288896800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6635221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55234 + ... + 55353.

It is an arithmetic number, because the mean of its divisors is an integer number (774116).

Almost surely, 2^6635220 is an apocalyptic number.

6635220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6635220 is an abundant number, since it is smaller than the sum of its proper divisors (11943564).

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

6635220 is a wasteful number, since it uses less digits than its factorization.

6635220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110599 (or 110597 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 6635220 is about 2575.8920784847. The cubic root of 6635220 is about 187.9108147979.

The spelling of 6635220 in words is "six million, six hundred thirty-five thousand, two hundred twenty".