681722076 has 48 divisors (see below), whose sum is σ = 1821738240. Its totient is φ = 194369280.

The previous prime is 681722059. The next prime is 681722141. The reversal of 681722076 is 670227186.

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 15 ways as a sum of consecutive naturals, for example, 32980 + ... + 49508.

It is an arithmetic number, because the mean of its divisors is an integer number (37952880).

Almost surely, 2^681722076 is an apocalyptic number.

It is an amenable number.

681722076 is an abundant number, since it is smaller than the sum of its proper divisors (1140016164).

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

681722076 is a wasteful number, since it uses less digits than its factorization.

681722076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17034 (or 17032 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 681722076 is about 26109.8080421898. The cubic root of 681722076 is about 880.1076297420.

The spelling of 681722076 in words is "six hundred eighty-one million, seven hundred twenty-two thousand, seventy-six".