66420012 has 24 divisors (see below), whose sum is σ = 155635200. Its totient is φ = 22046416.

The previous prime is 66420007. The next prime is 66420023. The reversal of 66420012 is 21002466.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8712 + ... + 14447.

It is an arithmetic number, because the mean of its divisors is an integer number (6484800).

Almost surely, 2^66420012 is an apocalyptic number.

It is an amenable number.

66420012 is an abundant number, since it is smaller than the sum of its proper divisors (89215188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66420012 is a wasteful number, since it uses less digits than its factorization.

66420012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23405 (or 23403 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 66420012 is about 8149.8473605338. The cubic root of 66420012 is about 404.9794472119.

Adding to 66420012 its reverse (21002466), we get a palindrome (87422478).

The spelling of 66420012 in words is "sixty-six million, four hundred twenty thousand, twelve".