66017228 has 24 divisors (see below), whose sum is σ = 119669760. Its totient is φ = 31833360.

The previous prime is 66017227. The next prime is 66017243. The reversal of 66017228 is 82271066.

It is a junction number, because it is equal to n+sod(n) for n = 66017194 and 66017203.

It is not an unprimeable number, because it can be changed into a prime (66017227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43775 + ... + 45257.

It is an arithmetic number, because the mean of its divisors is an integer number (4986240).

Almost surely, 2^66017228 is an apocalyptic number.

It is an amenable number.

66017228 is a deficient number, since it is larger than the sum of its proper divisors (53652532).

66017228 is a wasteful number, since it uses less digits than its factorization.

66017228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877 (or 1875 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 66017228 is about 8125.0986455550. The cubic root of 66017228 is about 404.1591618734.

The spelling of 66017228 in words is "sixty-six million, seventeen thousand, two hundred twenty-eight".