66560156800 has 192 divisors, whose sum is σ = 167763324960. Its totient is φ = 26088857600.

The previous prime is 66560156777. The next prime is 66560156827. The reversal of 66560156800 is 865106566.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34792644 + ... + 34794556.

Almost surely, 2^66560156800 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 66560156800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83881662480).

66560156800 is an abundant number, since it is smaller than the sum of its proper divisors (101203168160).

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

66560156800 is a wasteful number, since it uses less digits than its factorization.

66560156800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151 (or 2134 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 66560156800 in words is "sixty-six billion, five hundred sixty million, one hundred fifty-six thousand, eight hundred".