66333647887936 has 448 divisors, whose sum is σ = 159671943954432. Its totient is φ = 27170567424000.

The previous prime is 66333647887931. The next prime is 66333647887967. The reversal of 66333647887936 is 63978874633366.

It is a super-3 number, since 3×66333647887936³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (66333647887931) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8098353601 + ... + 8098361791.

It is an arithmetic number, because the mean of its divisors is an integer number (356410589184).

Almost surely, 2^{66333647887936} 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 66333647887936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79835971977216).

66333647887936 is an abundant number, since it is smaller than the sum of its proper divisors (93338296066496).

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

66333647887936 is a wasteful number, since it uses less digits than its factorization.

66333647887936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8423 (or 8391 counting only the distinct ones).

The product of its digits is 11851370496, while the sum is 79.

The spelling of 66333647887936 in words is "sixty-six trillion, three hundred thirty-three billion, six hundred forty-seven million, eight hundred eighty-seven thousand, nine hundred thirty-six".