6661228 has 12 divisors (see below), whose sum is σ = 13322512. Its totient is φ = 2854800.

The previous prime is 6661223. The next prime is 6661231. The reversal of 6661228 is 8221666.

6661228 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

6661228 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6661228.

It is not an unprimeable number, because it can be changed into a prime (6661223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118923 + ... + 118978.

Almost surely, 2^6661228 is an apocalyptic number.

It is an amenable number.

6661228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6661228 is a wasteful number, since it uses less digits than its factorization.

6661228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237912 (or 237910 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 6661228 is about 2580.9354893139. The cubic root of 6661228 is about 188.1560120396.

It can be divided in two parts, 6661 and 228, that added together give a square (6889 = 83²).

The spelling of 6661228 in words is "six million, six hundred sixty-one thousand, two hundred twenty-eight".