66228018 has 8 divisors (see below), whose sum is σ = 132456048. Its totient is φ = 22076004.

The previous prime is 66227989. The next prime is 66228037. The reversal of 66228018 is 81082266.

It is a sphenic number, since it is the product of 3 distinct primes.

66228018 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 66228018.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5518996 + ... + 5519007.

It is an arithmetic number, because the mean of its divisors is an integer number (16557006).

Almost surely, 2^66228018 is an apocalyptic number.

66228018 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.

66228018 is a wasteful number, since it uses less digits than its factorization.

66228018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11038008.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 66228018 is about 8138.0598424932. The cubic root of 66228018 is about 404.5888587907.

It can be divided in two parts, 662 and 28018, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 66228018 in words is "sixty-six million, two hundred twenty-eight thousand, eighteen".