66652212 has 48 divisors (see below), whose sum is σ = 172009152. Its totient is φ = 19918080.

The previous prime is 66652211. The next prime is 66652219. The reversal of 66652212 is 21225666.

It is a self number, because there is not a number n which added to its sum of digits gives 66652212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66652211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6178 + ... + 13094.

It is an arithmetic number, because the mean of its divisors is an integer number (3583524).

Almost surely, 2^66652212 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 66652212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86004576).

66652212 is an abundant number, since it is smaller than the sum of its proper divisors (105356940).

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

66652212 is a wasteful number, since it uses less digits than its factorization.

66652212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7008 (or 7006 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 66652212 is about 8164.0805973484. The cubic root of 66652212 is about 405.4508255192.

Adding to 66652212 its reverse (21225666), we get a palindrome (87877878).

The spelling of 66652212 in words is "sixty-six million, six hundred fifty-two thousand, two hundred twelve".