66228312 has 16 divisors (see below), whose sum is σ = 165570840. Its totient is φ = 22076096.

The previous prime is 66228289. The next prime is 66228313. The reversal of 66228312 is 21382266.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 66228312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66228313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1379733 + ... + 1379780.

Almost surely, 2^66228312 is an apocalyptic number.

It is an amenable number.

66228312 is an abundant number, since it is smaller than the sum of its proper divisors (99342528).

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

66228312 is a wasteful number, since it uses less digits than its factorization.

66228312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759522 (or 2759518 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 66228312 is about 8138.0779057465. The cubic root of 66228312 is about 404.5894574746.

The spelling of 66228312 in words is "sixty-six million, two hundred twenty-eight thousand, three hundred twelve".