66330212 has 24 divisors (see below), whose sum is σ = 125358072. Its totient is φ = 30528000.

The previous prime is 66330211. The next prime is 66330239. The reversal of 66330212 is 21203366.

It can be written as a sum of positive squares in 4 ways, for example, as 5271616 + 61058596 = 2296^2 + 7814^2 .

It is not an unprimeable number, because it can be changed into a prime (66330211) 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, 19262 + ... + 22442.

It is an arithmetic number, because the mean of its divisors is an integer number (5223253).

Almost surely, 2^66330212 is an apocalyptic number.

It is an amenable number.

66330212 is a deficient number, since it is larger than the sum of its proper divisors (59027860).

66330212 is a wasteful number, since it uses less digits than its factorization.

66330212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3599 (or 3597 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 66330212 is about 8144.3361914892. The cubic root of 66330212 is about 404.7968538685.

Adding to 66330212 its reverse (21203366), we get a palindrome (87533578).

The spelling of 66330212 in words is "sixty-six million, three hundred thirty thousand, two hundred twelve".