6537220 has 24 divisors (see below), whose sum is σ = 13785408. Its totient is φ = 2604000.

The previous prime is 6537217. The next prime is 6537227. The reversal of 6537220 is 227356.

It is not an unprimeable number, because it can be changed into a prime (6537227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5695 + ... + 6745.

It is an arithmetic number, because the mean of its divisors is an integer number (574392).

Almost surely, 2^6537220 is an apocalyptic number.

It is an amenable number.

6537220 is an abundant number, since it is smaller than the sum of its proper divisors (7248188).

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

6537220 is a wasteful number, since it uses less digits than its factorization.

6537220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371 (or 1369 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 6537220 is about 2556.7987797244. The cubic root of 6537220 is about 186.9810956325.

The spelling of 6537220 in words is "six million, five hundred thirty-seven thousand, two hundred twenty".