66717010560 has 256 divisors, whose sum is σ = 221971518720. Its totient is φ = 17028710400.

The previous prime is 66717010537. The next prime is 66717010579. The reversal of 66717010560 is 6501071766.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4164165 + ... + 4180155.

It is an arithmetic number, because the mean of its divisors is an integer number (867076245).

Almost surely, 2^66717010560 is an apocalyptic number.

66717010560 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 66717010560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110985759360).

66717010560 is an abundant number, since it is smaller than the sum of its proper divisors (155254508160).

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

66717010560 is a wasteful number, since it uses less digits than its factorization.

66717010560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16107 (or 16095 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 39.

The spelling of 66717010560 in words is "sixty-six billion, seven hundred seventeen million, ten thousand, five hundred sixty".