66387416645000 has 160 divisors (see below), whose sum is σ = 169697443560480. Its totient is φ = 24139284480000.

The previous prime is 66387416644961. The next prime is 66387416645029. The reversal of 66387416645000 is 54661478366.

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, 1117735304 + ... + 1117794696.

It is an arithmetic number, because the mean of its divisors is an integer number (1060609022253).

Almost surely, 2^{66387416645000} 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 66387416645000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84848721780240).

66387416645000 is an abundant number, since it is smaller than the sum of its proper divisors (103310026915480).

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

66387416645000 is a wasteful number, since it uses less digits than its factorization.

66387416645000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79753 (or 79734 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 66387416645000 in words is "sixty-six trillion, three hundred eighty-seven billion, four hundred sixteen million, six hundred forty-five thousand".