671110518 has 64 divisors (see below), whose sum is σ = 1503048960. Its totient is φ = 198344832.

The previous prime is 671110507. The next prime is 671110541. The reversal of 671110518 is 815011176.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 512821 + ... + 514127.

It is an arithmetic number, because the mean of its divisors is an integer number (23485140).

Almost surely, 2^671110518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671110518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (751524480).

671110518 is an abundant number, since it is smaller than the sum of its proper divisors (831938442).

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

671110518 is a wasteful number, since it uses less digits than its factorization.

671110518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581.

The product of its (nonzero) digits is 1680, while the sum is 30.

The square root of 671110518 is about 25905.8008561789. The cubic root of 671110518 is about 875.5171986672.

The spelling of 671110518 in words is "six hundred seventy-one million, one hundred ten thousand, five hundred eighteen".