671788916860 has 24 divisors (see below), whose sum is σ = 1418142894336. Its totient is φ = 267308677440.

The previous prime is 671788916833. The next prime is 671788916867. The reversal of 671788916860 is 68619887176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671788916867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87926667 + ... + 87934306.

It is an arithmetic number, because the mean of its divisors is an integer number (59089287264).

Almost surely, 2^671788916860 is an apocalyptic number.

It is an amenable number.

671788916860 is an abundant number, since it is smaller than the sum of its proper divisors (746353977476).

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

671788916860 is a wasteful number, since it uses less digits than its factorization.

671788916860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175861173 (or 175861171 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 67.

The spelling of 671788916860 in words is "six hundred seventy-one billion, seven hundred eighty-eight million, nine hundred sixteen thousand, eight hundred sixty".