66228036 has 24 divisors (see below), whose sum is σ = 176608320. Its totient is φ = 18922272.

The previous prime is 66227989. The next prime is 66228037. The reversal of 66228036 is 63082266.

It is a junction number, because it is equal to n+sod(n) for n = 66227988 and 66228006.

It is not an unprimeable number, because it can be changed into a prime (66228037) 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, 394131 + ... + 394298.

It is an arithmetic number, because the mean of its divisors is an integer number (7358680).

Almost surely, 2^66228036 is an apocalyptic number.

It is an amenable number.

66228036 is an abundant number, since it is smaller than the sum of its proper divisors (110380284).

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

66228036 is a wasteful number, since it uses less digits than its factorization.

66228036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788443 (or 788441 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 66228036 is about 8138.0609484078. The cubic root of 66228036 is about 404.5888954449.

The spelling of 66228036 in words is "sixty-six million, two hundred twenty-eight thousand, thirty-six".