66505615000 has 160 divisors (see below), whose sum is σ = 179990197200. Its totient is φ = 22760960000.

The previous prime is 66505614977. The next prime is 66505615031. The reversal of 66505615000 is 51650566.

66505615000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 899436 + ... + 970564.

Almost surely, 2^66505615000 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 66505615000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89995098600).

66505615000 is an abundant number, since it is smaller than the sum of its proper divisors (113484582200).

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

66505615000 is a wasteful number, since it uses less digits than its factorization.

66505615000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71183 (or 71164 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 66505615000 in words is "sixty-six billion, five hundred five million, six hundred fifteen thousand".