671333673808 has 80 divisors (see below), whose sum is σ = 1507838492160. Its totient is φ = 283594134528.

The previous prime is 671333673797. The next prime is 671333673821. The reversal of 671333673808 is 808376333176.

671333673808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×671333673808² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13359033 + ... + 13409191.

It is an arithmetic number, because the mean of its divisors is an integer number (18847981152).

Almost surely, 2^671333673808 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 671333673808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753919246080).

671333673808 is an abundant number, since it is smaller than the sum of its proper divisors (836504818352).

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

671333673808 is a wasteful number, since it uses less digits than its factorization.

671333673808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51884 (or 51878 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 55.

The spelling of 671333673808 in words is "six hundred seventy-one billion, three hundred thirty-three million, six hundred seventy-three thousand, eight hundred eight".