671886996408 has 48 divisors (see below), whose sum is σ = 1823400142200. Its totient is φ = 223506185280.

The previous prime is 671886996401. The next prime is 671886996409. The reversal of 671886996408 is 804699688176.

671886996408 is a `hidden beast` number, since 6 + 71 + 8 + 8 + 69 + 96 + 408 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671886996401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9467463 + ... + 9538166.

Almost surely, 2^671886996408 is an apocalyptic number.

It is an amenable number.

671886996408 is an abundant number, since it is smaller than the sum of its proper divisors (1151513145792).

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

671886996408 is a wasteful number, since it uses less digits than its factorization.

671886996408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19006132 (or 19006125 counting only the distinct ones).

The product of its (nonzero) digits is 250822656, while the sum is 72.

The spelling of 671886996408 in words is "six hundred seventy-one billion, eight hundred eighty-six million, nine hundred ninety-six thousand, four hundred eight".