671345511 has 8 divisors (see below), whose sum is σ = 900488064. Its totient is φ = 444883320.

The previous prime is 671345489. The next prime is 671345513. The reversal of 671345511 is 115543176.

671345511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 671345511 - 2¹⁵ = 671312743 is a prime.

It is a super-2 number, since 2×671345511² = 901409590279702242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671345513) 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, 669505 + ... + 670506.

It is an arithmetic number, because the mean of its divisors is an integer number (112561008).

Almost surely, 2^671345511 is an apocalyptic number.

671345511 is a deficient number, since it is larger than the sum of its proper divisors (229142553).

671345511 is a wasteful number, since it uses less digits than its factorization.

671345511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340181.

The product of its digits is 12600, while the sum is 33.

The square root of 671345511 is about 25910.3359877868. The cubic root of 671345511 is about 875.6193757794.

Adding to 671345511 its reverse (115543176), we get a palindrome (786888687).

The spelling of 671345511 in words is "six hundred seventy-one million, three hundred forty-five thousand, five hundred eleven".