66719005000 has 80 divisors (see below), whose sum is σ = 157260660480. Its totient is φ = 26527464000.

The previous prime is 66719004997. The next prime is 66719005007. The reversal of 66719005000 is 50091766.

It is not an unprimeable number, because it can be changed into a prime (66719005007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 795049 + ... + 874951.

It is an arithmetic number, because the mean of its divisors is an integer number (1965758256).

Almost surely, 2^66719005000 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 66719005000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78630330240).

66719005000 is an abundant number, since it is smaller than the sum of its proper divisors (90541655480).

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

66719005000 is a wasteful number, since it uses less digits than its factorization.

66719005000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80096 (or 80077 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

Adding to 66719005000 its reverse (50091766), we get a palindrome (66769096766).

The spelling of 66719005000 in words is "sixty-six billion, seven hundred nineteen million, five thousand".