671436806976 has 784 divisors, whose sum is σ = 2266728105600. Its totient is φ = 195787984896.

The previous prime is 671436806939. The next prime is 671436806977. The reversal of 671436806976 is 679608634176.

671436806976 is a `hidden beast` number, since 6 + 71 + 436 + 8 + 0 + 69 + 76 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671436806977) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1037769085 + ... + 1037769731.

Almost surely, 2^671436806976 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 671436806976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1133364052800).

671436806976 is an abundant number, since it is smaller than the sum of its proper divisors (1595291298624).

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

671436806976 is a wasteful number, since it uses less digits than its factorization.

671436806976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 63.

The spelling of 671436806976 in words is "six hundred seventy-one billion, four hundred thirty-six million, eight hundred six thousand, nine hundred seventy-six".