66552212 has 24 divisors (see below), whose sum is σ = 129810240. Its totient is φ = 29669760.

The previous prime is 66552173. The next prime is 66552217. The reversal of 66552212 is 21225566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66552217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24464 + ... + 27047.

It is an arithmetic number, because the mean of its divisors is an integer number (5408760).

Almost surely, 2^66552212 is an apocalyptic number.

It is an amenable number.

66552212 is a deficient number, since it is larger than the sum of its proper divisors (63258028).

66552212 is a wasteful number, since it uses less digits than its factorization.

66552212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51551 (or 51549 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 66552212 is about 8157.9539101419. The cubic root of 66552212 is about 405.2479546507.

Adding to 66552212 its reverse (21225566), we get a palindrome (87777778).

The spelling of 66552212 in words is "sixty-six million, five hundred fifty-two thousand, two hundred twelve".