681110071 has 4 divisors (see below), whose sum is σ = 681318000. Its totient is φ = 680902144.

The previous prime is 681110069. The next prime is 681110077. The reversal of 681110071 is 170011186.

681110071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 681110071 - 2¹ = 681110069 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 (681110077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98971 + ... + 105628.

It is an arithmetic number, because the mean of its divisors is an integer number (170329500).

Almost surely, 2^681110071 is an apocalyptic number.

681110071 is a deficient number, since it is larger than the sum of its proper divisors (207929).

681110071 is a wasteful number, since it uses less digits than its factorization.

681110071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207928.

The product of its (nonzero) digits is 336, while the sum is 25.

The square root of 681110071 is about 26098.0855811303. The cubic root of 681110071 is about 879.8441834141.

The spelling of 681110071 in words is "six hundred eighty-one million, one hundred ten thousand, seventy-one".