66028230 has 128 divisors (see below), whose sum is σ = 189273600. Its totient is φ = 16329600.

The previous prime is 66028229. The next prime is 66028241. The reversal of 66028230 is 3282066.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66028194 and 66028203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 312825 + ... + 313035.

It is an arithmetic number, because the mean of its divisors is an integer number (1478700).

Almost surely, 2^66028230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66028230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94636800).

66028230 is an abundant number, since it is smaller than the sum of its proper divisors (123245370).

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

66028230 is a wasteful number, since it uses less digits than its factorization.

66028230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 66028230 is about 8125.7756552836. The cubic root of 66028230 is about 404.1816121349.

The spelling of 66028230 in words is "sixty-six million, twenty-eight thousand, two hundred thirty".