66273228 has 60 divisors (see below), whose sum is σ = 198008272. Its totient is φ = 18934560.

The previous prime is 66273217. The next prime is 66273239. The reversal of 66273228 is 82237266.

66273228 is a `hidden beast` number, since 6 + 627 + 3 + 2 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (66273217) and next prime (66273239).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 66273192 and 66273201.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12343 + ... + 16878.

Almost surely, 2^66273228 is an apocalyptic number.

It is an amenable number.

66273228 is an abundant number, since it is smaller than the sum of its proper divisors (131735044).

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

66273228 is a wasteful number, since it uses less digits than its factorization.

66273228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29244 (or 29233 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 66273228 is about 8140.8370576987. The cubic root of 66273228 is about 404.6809009116.

The spelling of 66273228 in words is "sixty-six million, two hundred seventy-three thousand, two hundred twenty-eight".