66021130 has 48 divisors (see below), whose sum is σ = 140373216. Its totient is φ = 22286880.

The previous prime is 66021113. The next prime is 66021133. The reversal of 66021130 is 3112066.

It is a junction number, because it is equal to n+sod(n) for n = 66021098 and 66021107.

It is not an unprimeable number, because it can be changed into a prime (66021133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31825 + ... + 33835.

It is an arithmetic number, because the mean of its divisors is an integer number (2924442).

Almost surely, 2^66021130 is an apocalyptic number.

66021130 is an abundant number, since it is smaller than the sum of its proper divisors (74352086).

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

66021130 is a wasteful number, since it uses less digits than its factorization.

66021130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099 (or 2092 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 66021130 is about 8125.3387621686. The cubic root of 66021130 is about 404.1671244312.

Adding to 66021130 its reverse (3112066), we get a palindrome (69133196).

The spelling of 66021130 in words is "sixty-six million, twenty-one thousand, one hundred thirty".