66002228 has 36 divisors (see below), whose sum is σ = 125870220. Its totient is φ = 30177792.

The previous prime is 66002221. The next prime is 66002243. The reversal of 66002228 is 82220066.

It can be written as a sum of positive squares in 6 ways, for example, as 9872164 + 56130064 = 3142^2 + 7492^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66002197 and 66002206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66002221) 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, 92738 + ... + 93446.

It is an arithmetic number, because the mean of its divisors is an integer number (3496395).

Almost surely, 2^66002228 is an apocalyptic number.

66002228 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66002228 is a deficient number, since it is larger than the sum of its proper divisors (59867992).

66002228 is a wasteful number, since it uses less digits than its factorization.

66002228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804 (or 765 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 66002228 is about 8124.1755273997. The cubic root of 66002228 is about 404.1285494266.

The spelling of 66002228 in words is "sixty-six million, two thousand, two hundred twenty-eight".