66780034748 has 72 divisors (see below), whose sum is σ = 141909042240. Its totient is φ = 27389819520.

The previous prime is 66780034747. The next prime is 66780034757. The reversal of 66780034748 is 84743008766.

It is a self number, because there is not a number n which added to its sum of digits gives 66780034748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66780034747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 366893 + ... + 517851.

It is an arithmetic number, because the mean of its divisors is an integer number (1970958920).

Almost surely, 2^66780034748 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 66780034748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70954521120).

66780034748 is an abundant number, since it is smaller than the sum of its proper divisors (75129007492).

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

66780034748 is a wasteful number, since it uses less digits than its factorization.

66780034748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151075 (or 151066 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 66780034748 in words is "sixty-six billion, seven hundred eighty million, thirty-four thousand, seven hundred forty-eight".