66606212 has 12 divisors (see below), whose sum is σ = 116619216. Its totient is φ = 33286440.

The previous prime is 66606209. The next prime is 66606217. The reversal of 66606212 is 21260666.

It is not an unprimeable number, because it can be changed into a prime (66606217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10787 + ... + 15797.

It is an arithmetic number, because the mean of its divisors is an integer number (9718268).

Almost surely, 2^66606212 is an apocalyptic number.

It is an amenable number.

66606212 is a deficient number, since it is larger than the sum of its proper divisors (50013004).

66606212 is a wasteful number, since it uses less digits than its factorization.

66606212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8338 (or 8336 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 66606212 is about 8161.2628924695. The cubic root of 66606212 is about 405.3575301398.

Adding to 66606212 its reverse (21260666), we get a palindrome (87866878).

The spelling of 66606212 in words is "sixty-six million, six hundred six thousand, two hundred twelve".