6653220 has 144 divisors (see below), whose sum is σ = 22675968. Its totient is φ = 1451520.

The previous prime is 6653219. The next prime is 6653221. The reversal of 6653220 is 223566.

It is an interprime number because it is at equal distance from previous prime (6653219) and next prime (6653221).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6653221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91104 + ... + 91176.

It is an arithmetic number, because the mean of its divisors is an integer number (157472).

Almost surely, 2^6653220 is an apocalyptic number.

6653220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6653220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11337984).

6653220 is an abundant number, since it is smaller than the sum of its proper divisors (16022748).

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

6653220 is a wasteful number, since it uses less digits than its factorization.

6653220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 121 counting only the distinct ones).

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

The square root of 6653220 is about 2579.3836473080. The cubic root of 6653220 is about 188.0805826270.

Adding to 6653220 its reverse (223566), we get a palindrome (6876786).

The spelling of 6653220 in words is "six million, six hundred fifty-three thousand, two hundred twenty".