671327720780 has 12 divisors (see below), whose sum is σ = 1409788213680. Its totient is φ = 268531088304.

The previous prime is 671327720771. The next prime is 671327720801. The reversal of 671327720780 is 87027723176.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16783193000 + ... + 16783193039.

It is an arithmetic number, because the mean of its divisors is an integer number (117482351140).

Almost surely, 2^671327720780 is an apocalyptic number.

It is an amenable number.

671327720780 is an abundant number, since it is smaller than the sum of its proper divisors (738460492900).

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

671327720780 is a wasteful number, since it uses less digits than its factorization.

671327720780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33566386048 (or 33566386046 counting only the distinct ones).

The product of its (nonzero) digits is 1382976, while the sum is 50.

The spelling of 671327720780 in words is "six hundred seventy-one billion, three hundred twenty-seven million, seven hundred twenty thousand, seven hundred eighty".