66387012 has 24 divisors (see below), whose sum is σ = 158506656. Its totient is φ = 21614208.

The previous prime is 66386981. The next prime is 66387031. The reversal of 66387012 is 21078366.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63813 + ... + 64844.

It is an arithmetic number, because the mean of its divisors is an integer number (6604444).

Almost surely, 2^66387012 is an apocalyptic number.

It is an amenable number.

66387012 is an abundant number, since it is smaller than the sum of its proper divisors (92119644).

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

66387012 is a wasteful number, since it uses less digits than its factorization.

66387012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128707 (or 128705 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 66387012 is about 8147.8225312043. The cubic root of 66387012 is about 404.9123663464.

The spelling of 66387012 in words is "sixty-six million, three hundred eighty-seven thousand, twelve".