66845012412 has 48 divisors (see below), whose sum is σ = 169842153600. Its totient is φ = 20381054400.

The previous prime is 66845012411. The next prime is 66845012461. The reversal of 66845012412 is 21421054866.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66845012411) 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 15 ways as a sum of consecutive naturals, for example, 5048214 + ... + 5061437.

It is an arithmetic number, because the mean of its divisors is an integer number (3538378200).

Almost surely, 2^66845012412 is an apocalyptic number.

It is an amenable number.

66845012412 is an abundant number, since it is smaller than the sum of its proper divisors (102997141188).

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

66845012412 is a wasteful number, since it uses less digits than its factorization.

66845012412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10109706 (or 10109704 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 66845012412 in words is "sixty-six billion, eight hundred forty-five million, twelve thousand, four hundred twelve".