66005516000 has 96 divisors (see below), whose sum is σ = 165947509728. Its totient is φ = 25788134400.

The previous prime is 66005515993. The next prime is 66005516029. The reversal of 66005516000 is 61550066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19877 + ... + 363876.

It is an arithmetic number, because the mean of its divisors is an integer number (1728619893).

Almost surely, 2^66005516000 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 66005516000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82973754864).

66005516000 is an abundant number, since it is smaller than the sum of its proper divisors (99941993728).

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

66005516000 is a wasteful number, since it uses less digits than its factorization.

66005516000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383821 (or 383803 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 66005516000 in words is "sixty-six billion, five million, five hundred sixteen thousand".