66560212 has 24 divisors (see below), whose sum is σ = 119437920. Its totient is φ = 32445600.

The previous prime is 66560203. The next prime is 66560213. The reversal of 66560212 is 21206566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66560213) 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, 25839 + ... + 28297.

It is an arithmetic number, because the mean of its divisors is an integer number (4976580).

Almost surely, 2^66560212 is an apocalyptic number.

It is an amenable number.

66560212 is a deficient number, since it is larger than the sum of its proper divisors (52877708).

66560212 is a wasteful number, since it uses less digits than its factorization.

66560212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631 (or 2629 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66560212 is about 8158.4442144321. Note that the first 3 decimals coincide. The cubic root of 66560212 is about 405.2641917956.

Adding to 66560212 its reverse (21206566), we get a palindrome (87766778).

The spelling of 66560212 in words is "sixty-six million, five hundred sixty thousand, two hundred twelve".