671870557 has 8 divisors (see below), whose sum is σ = 674490176. Its totient is φ = 669256992.

The previous prime is 671870543. The next prime is 671870561. The reversal of 671870557 is 755078176.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671870557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671870587) 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, 382393 + ... + 384145.

It is an arithmetic number, because the mean of its divisors is an integer number (84311272).

Almost surely, 2^671870557 is an apocalyptic number.

It is an amenable number.

671870557 is a deficient number, since it is larger than the sum of its proper divisors (2619619).

671870557 is a wasteful number, since it uses less digits than its factorization.

671870557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027.

The product of its (nonzero) digits is 411600, while the sum is 46.

The square root of 671870557 is about 25920.4659873236. The cubic root of 671870557 is about 875.8475844757.

The spelling of 671870557 in words is "six hundred seventy-one million, eight hundred seventy thousand, five hundred fifty-seven".