66168766020880 has 160 divisors (see below), whose sum is σ = 156946754764800. Its totient is φ = 25938484416000.

The previous prime is 66168766020761. The next prime is 66168766020919. The reversal of 66168766020880 is 8802066786166.

66168766020880 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, 7230764305 + ... + 7230773455.

It is an arithmetic number, because the mean of its divisors is an integer number (980917217280).

Almost surely, 2^{66168766020880} 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 66168766020880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78473377382400).

66168766020880 is an abundant number, since it is smaller than the sum of its proper divisors (90777988743920).

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

66168766020880 is a wasteful number, since it uses less digits than its factorization.

66168766020880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17613 (or 17607 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 64.

The spelling of 66168766020880 in words is "sixty-six trillion, one hundred sixty-eight billion, seven hundred sixty-six million, twenty thousand, eight hundred eighty".