671340787220 has 96 divisors (see below), whose sum is σ = 1437181468800. Its totient is φ = 263368765440.

The previous prime is 671340787213. The next prime is 671340787223. The reversal of 671340787220 is 22787043176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671340787223) 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 31 ways as a sum of consecutive naturals, for example, 395137931 + ... + 395139629.

It is an arithmetic number, because the mean of its divisors is an integer number (14970640300).

Almost surely, 2^671340787220 is an apocalyptic number.

It is an amenable number.

671340787220 is an abundant number, since it is smaller than the sum of its proper divisors (765840681580).

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

671340787220 is a wasteful number, since it uses less digits than its factorization.

671340787220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145 (or 3143 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 47.

The spelling of 671340787220 in words is "six hundred seventy-one billion, three hundred forty million, seven hundred eighty-seven thousand, two hundred twenty".