66773324880 has 960 divisors, whose sum is σ = 263233152000. Its totient is φ = 15058206720.

The previous prime is 66773324843. The next prime is 66773324939. The reversal of 66773324880 is 8842337766.

66773324880 is a `hidden beast` number, since 6 + 67 + 73 + 32 + 488 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 448143046 + ... + 448143194.

It is an arithmetic number, because the mean of its divisors is an integer number (274201200).

Almost surely, 2^66773324880 is an apocalyptic number.

66773324880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66773324880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131616576000).

66773324880 is an abundant number, since it is smaller than the sum of its proper divisors (196459827120).

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

66773324880 is a wasteful number, since it uses less digits than its factorization.

66773324880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 54.

The spelling of 66773324880 in words is "sixty-six billion, seven hundred seventy-three million, three hundred twenty-four thousand, eight hundred eighty".