66733367351856 has 160 divisors (see below), whose sum is σ = 182829725434368. Its totient is φ = 20902224752640.

The previous prime is 66733367351719. The next prime is 66733367351881. The reversal of 66733367351856 is 65815376333766.

66733367351856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 1412711470 + ... + 1412758706.

Almost surely, 2^{66733367351856} 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 66733367351856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91414862717184).

66733367351856 is an abundant number, since it is smaller than the sum of its proper divisors (116096358082512).

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

66733367351856 is a wasteful number, since it uses less digits than its factorization.

66733367351856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50019 (or 50013 counting only the distinct ones).

The product of its digits is 1028764800, while the sum is 69.

The spelling of 66733367351856 in words is "sixty-six trillion, seven hundred thirty-three billion, three hundred sixty-seven million, three hundred fifty-one thousand, eight hundred fifty-six".