66130220 has 48 divisors (see below), whose sum is σ = 152409600. Its totient is φ = 23951616.

The previous prime is 66130213. The next prime is 66130243. The reversal of 66130220 is 2203166.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 66130192 and 66130201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11381 + ... + 16179.

It is an arithmetic number, because the mean of its divisors is an integer number (3175200).

Almost surely, 2^66130220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66130220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76204800).

66130220 is an abundant number, since it is smaller than the sum of its proper divisors (86279380).

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

66130220 is a wasteful number, since it uses less digits than its factorization.

66130220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874 (or 4872 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 66130220 is about 8132.0489423023. The cubic root of 66130220 is about 404.3896104217.

Adding to 66130220 its reverse (2203166), we get a palindrome (68333386).

The spelling of 66130220 in words is "sixty-six million, one hundred thirty thousand, two hundred twenty".