6633220 has 36 divisors (see below), whose sum is σ = 15316812. Its totient is φ = 2411200.

The previous prime is 6633197. The next prime is 6633229. The reversal of 6633220 is 223366.

It can be written as a sum of positive squares in 2 ways, for example, as 2172676 + 4460544 = 1474^2 + 2112^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6633191 and 6633200.

It is not an unprimeable number, because it can be changed into a prime (6633229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1050 + ... + 3790.

It is an arithmetic number, because the mean of its divisors is an integer number (425467).

Almost surely, 2^6633220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6633220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7658406).

6633220 is an abundant number, since it is smaller than the sum of its proper divisors (8683592).

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

6633220 is a wasteful number, since it uses less digits than its factorization.

6633220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772 (or 2759 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 6633220 is about 2575.5038342041. The cubic root of 6633220 is about 187.8919327615.

Adding to 6633220 its reverse (223366), we get a palindrome (6856586).

It can be divided in two parts, 663 and 3220, that added together give a palindrome (3883).

The spelling of 6633220 in words is "six million, six hundred thirty-three thousand, two hundred twenty".