681166328 has 32 divisors (see below), whose sum is σ = 1301097600. Its totient is φ = 334227552.

The previous prime is 681166327. The next prime is 681166331. The reversal of 681166328 is 823661186.

681166328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681166327) 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, 417851 + ... + 419477.

It is an arithmetic number, because the mean of its divisors is an integer number (40659300).

Almost surely, 2^681166328 is an apocalyptic number.

It is an amenable number.

681166328 is a deficient number, since it is larger than the sum of its proper divisors (619931272).

681166328 is a wasteful number, since it uses less digits than its factorization.

681166328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579 (or 2575 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 681166328 is about 26099.1633582381. The cubic root of 681166328 is about 879.8684066313.

The spelling of 681166328 in words is "six hundred eighty-one million, one hundred sixty-six thousand, three hundred twenty-eight".