66227022420 has 96 divisors (see below), whose sum is σ = 199866901248. Its totient is φ = 16288407552.

The previous prime is 66227022409. The next prime is 66227022467. The reversal of 66227022420 is 2422072266.

66227022420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 914377 + ... + 984143.

It is an arithmetic number, because the mean of its divisors is an integer number (2081946888).

Almost surely, 2^66227022420 is an apocalyptic number.

66227022420 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 66227022420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99933450624).

66227022420 is an abundant number, since it is smaller than the sum of its proper divisors (133639878828).

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

66227022420 is a wasteful number, since it uses less digits than its factorization.

66227022420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71009 (or 71007 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

Adding to 66227022420 its reverse (2422072266), we get a palindrome (68649094686).

The spelling of 66227022420 in words is "sixty-six billion, two hundred twenty-seven million, twenty-two thousand, four hundred twenty".