66670012 has 12 divisors (see below), whose sum is σ = 122813320. Its totient is φ = 31580496.

The previous prime is 66669997. The next prime is 66670013. The reversal of 66670012 is 21007666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66670013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438543 + ... + 438694.

Almost surely, 2^66670012 is an apocalyptic number.

It is an amenable number.

66670012 is a deficient number, since it is larger than the sum of its proper divisors (56143308).

66670012 is a wasteful number, since it uses less digits than its factorization.

66670012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877260 (or 877258 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 66670012 is about 8165.1706656995. The cubic root of 66670012 is about 405.4869152558.

Adding to 66670012 its reverse (21007666), we get a palindrome (87677678).

The spelling of 66670012 in words is "sixty-six million, six hundred seventy thousand, twelve".