66030120 has 128 divisors (see below), whose sum is σ = 237081600. Its totient is φ = 16250112.

The previous prime is 66030119. The next prime is 66030229. The reversal of 66030120 is 2103066.

It is a happy number.

66030120 is a `hidden beast` number, since 660 + 3 + 0 + 1 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 66030093 and 66030102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11689 + ... + 16391.

It is an arithmetic number, because the mean of its divisors is an integer number (1852200).

Almost surely, 2^66030120 is an apocalyptic number.

66030120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66030120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118540800).

66030120 is an abundant number, since it is smaller than the sum of its proper divisors (171051480).

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

66030120 is a wasteful number, since it uses less digits than its factorization.

66030120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4736 (or 4726 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 66030120 is about 8125.8919510414. The cubic root of 66030120 is about 404.1854685459.

Adding to 66030120 its reverse (2103066), we get a palindrome (68133186).

The spelling of 66030120 in words is "sixty-six million, thirty thousand, one hundred twenty".