66559480080 has 160 divisors (see below), whose sum is σ = 208036684800. Its totient is φ = 17603143680.

The previous prime is 66559480069. The next prime is 66559480121. The reversal of 66559480080 is 8008495566.

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, 36510049 + ... + 36511871.

It is an arithmetic number, because the mean of its divisors is an integer number (1300229280).

Almost surely, 2^66559480080 is an apocalyptic number.

66559480080 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 66559480080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104018342400).

66559480080 is an abundant number, since it is smaller than the sum of its proper divisors (141477204720).

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

66559480080 is a wasteful number, since it uses less digits than its factorization.

66559480080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009 (or 3003 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 66559480080 in words is "sixty-six billion, five hundred fifty-nine million, four hundred eighty thousand, eighty".