66229780480 has 240 divisors, whose sum is σ = 177224906880. Its totient is φ = 23611834368.

The previous prime is 66229780469. The next prime is 66229780481. The reversal of 66229780480 is 8408792266.

It is not an unprimeable number, because it can be changed into a prime (66229780481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26458909 + ... + 26461411.

It is an arithmetic number, because the mean of its divisors is an integer number (738437112).

Almost surely, 2^66229780480 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 66229780480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88612453440).

66229780480 is an abundant number, since it is smaller than the sum of its proper divisors (110995126400).

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

66229780480 is a wasteful number, since it uses less digits than its factorization.

66229780480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572 (or 2546 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 66229780480 in words is "sixty-six billion, two hundred twenty-nine million, seven hundred eighty thousand, four hundred eighty".