681627711 has 4 divisors (see below), whose sum is σ = 908836952. Its totient is φ = 454418472.

The previous prime is 681627697. The next prime is 681627731. The reversal of 681627711 is 117726186.

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

It is not a de Polignac number, because 681627711 - 2¹⁵ = 681594943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681627711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681627731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113604616 + ... + 113604621.

It is an arithmetic number, because the mean of its divisors is an integer number (227209238).

Almost surely, 2^681627711 is an apocalyptic number.

681627711 is a deficient number, since it is larger than the sum of its proper divisors (227209241).

681627711 is a wasteful number, since it uses less digits than its factorization.

681627711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227209240.

The product of its digits is 28224, while the sum is 39.

The square root of 681627711 is about 26108.0009001072. Note that the first 3 decimals coincide. The cubic root of 681627711 is about 880.0670192587.

The spelling of 681627711 in words is "six hundred eighty-one million, six hundred twenty-seven thousand, seven hundred eleven".