66704787846 has 32 divisors (see below), whose sum is σ = 148660087680. Its totient is φ = 22170845448.

The previous prime is 66704787829. The next prime is 66704787847. The reversal of 66704787846 is 64878740766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66704787847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1761196 + ... + 1798671.

It is an arithmetic number, because the mean of its divisors is an integer number (4645627740).

Almost surely, 2^66704787846 is an apocalyptic number.

66704787846 is an abundant number, since it is smaller than the sum of its proper divisors (81955299834).

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

66704787846 is a wasteful number, since it uses less digits than its factorization.

66704787846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560225 (or 3560219 counting only the distinct ones).

The product of its (nonzero) digits is 75866112, while the sum is 63.

The spelling of 66704787846 in words is "sixty-six billion, seven hundred four million, seven hundred eighty-seven thousand, eight hundred forty-six".