66502664212 has 12 divisors (see below), whose sum is σ = 116468714880. Its totient is φ = 33225888536.

The previous prime is 66502664201. The next prime is 66502664213. The reversal of 66502664212 is 21246620566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66502664213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6355012 + ... + 6365467.

It is an arithmetic number, because the mean of its divisors is an integer number (9705726240).

Almost surely, 2^66502664212 is an apocalyptic number.

It is an amenable number.

66502664212 is a deficient number, since it is larger than the sum of its proper divisors (49966050668).

66502664212 is a wasteful number, since it uses less digits than its factorization.

66502664212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12721790 (or 12721788 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 66502664212 in words is "sixty-six billion, five hundred two million, six hundred sixty-four thousand, two hundred twelve".