42780066700 has 144 divisors (see below), whose sum is σ = 111446866944. Its totient is φ = 13936032000.

The previous prime is 42780066697. The next prime is 42780066727. The reversal of 42780066700 is 766008724.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2422302 + ... + 2439898.

It is an arithmetic number, because the mean of its divisors is an integer number (773936576).

Almost surely, 2^42780066700 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 42780066700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55723433472).

42780066700 is an abundant number, since it is smaller than the sum of its proper divisors (68666800244).

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

42780066700 is a wasteful number, since it uses less digits than its factorization.

42780066700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17792 (or 17785 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 42780066700 in words is "forty-two billion, seven hundred eighty million, sixty-six thousand, seven hundred".