66708120 has 96 divisors (see below), whose sum is σ = 207576720. Its totient is φ = 17149440.

The previous prime is 66708113. The next prime is 66708137. The reversal of 66708120 is 2180766.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100590 + ... + 101250.

Almost surely, 2^66708120 is an apocalyptic number.

66708120 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 66708120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103788360).

66708120 is an abundant number, since it is smaller than the sum of its proper divisors (140868600).

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

66708120 is a wasteful number, since it uses less digits than its factorization.

66708120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 66708120 is about 8167.5039026621. The cubic root of 66708120 is about 405.5641581406.

Adding to 66708120 its reverse (2180766), we get a palindrome (68888886).

The spelling of 66708120 in words is "sixty-six million, seven hundred eight thousand, one hundred twenty".