66088811880 has 768 divisors, whose sum is σ = 281631168000. Its totient is φ = 13050740736.

The previous prime is 66088811821. The next prime is 66088811891. The reversal of 66088811880 is 8811888066.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 55396564 + ... + 55397756.

It is an arithmetic number, because the mean of its divisors is an integer number (366707250).

Almost surely, 2^66088811880 is an apocalyptic number.

66088811880 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 66088811880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140815584000).

66088811880 is an abundant number, since it is smaller than the sum of its proper divisors (215542356120).

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

66088811880 is a wasteful number, since it uses less digits than its factorization.

66088811880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338 (or 1331 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 54.

The spelling of 66088811880 in words is "sixty-six billion, eighty-eight million, eight hundred eleven thousand, eight hundred eighty".