66386664012984 has 192 divisors, whose sum is σ = 195291456464160. Its totient is φ = 18749184491520.

The previous prime is 66386664012953. The next prime is 66386664013003. The reversal of 66386664012984 is 48921046668366.

66386664012984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93298684 + ... + 94007540.

Almost surely, 2^{66386664012984} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66386664012984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97645728232080).

66386664012984 is an abundant number, since it is smaller than the sum of its proper divisors (128904792451176).

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

66386664012984 is a wasteful number, since it uses less digits than its factorization.

66386664012984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709798 (or 709787 counting only the distinct ones).

The product of its (nonzero) digits is 429981696, while the sum is 69.

The spelling of 66386664012984 in words is "sixty-six trillion, three hundred eighty-six billion, six hundred sixty-four million, twelve thousand, nine hundred eighty-four".