671646334871 has 8 divisors (see below), whose sum is σ = 671912240688. Its totient is φ = 671380488000.

The previous prime is 671646334867. The next prime is 671646334951. The reversal of 671646334871 is 178433646176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671646334871 - 2² = 671646334867 is a prime.

It is a super-2 number, since 2×671646334871² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671646334841) 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, 52298411 + ... + 52311251.

It is an arithmetic number, because the mean of its divisors is an integer number (83989030086).

Almost surely, 2^671646334871 is an apocalyptic number.

671646334871 is a deficient number, since it is larger than the sum of its proper divisors (265905817).

671646334871 is a wasteful number, since it uses less digits than its factorization.

671646334871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29473.

The product of its digits is 12192768, while the sum is 56.

The spelling of 671646334871 in words is "six hundred seventy-one billion, six hundred forty-six million, three hundred thirty-four thousand, eight hundred seventy-one".