671189965 has 8 divisors (see below), whose sum is σ = 806042880. Its totient is φ = 536542032.

The previous prime is 671189957. The next prime is 671189983. The reversal of 671189965 is 569981176.

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 671189965 - 2³ = 671189957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43945 + ... + 57214.

It is an arithmetic number, because the mean of its divisors is an integer number (100755360).

Almost surely, 2^671189965 is an apocalyptic number.

It is an amenable number.

671189965 is a deficient number, since it is larger than the sum of its proper divisors (134852915).

671189965 is a wasteful number, since it uses less digits than its factorization.

671189965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102491.

The product of its digits is 816480, while the sum is 52.

The square root of 671189965 is about 25907.3341932357. The cubic root of 671189965 is about 875.5517456201.

The spelling of 671189965 in words is "six hundred seventy-one million, one hundred eighty-nine thousand, nine hundred sixty-five".