681667232 has 24 divisors (see below), whose sum is σ = 1342801152. Its totient is φ = 340638400.

The previous prime is 681667219. The next prime is 681667249. The reversal of 681667232 is 232766186.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 681667232.

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 3 ways as a sum of consecutive naturals, for example, 62507 + ... + 72597.

It is an arithmetic number, because the mean of its divisors is an integer number (55950048).

Almost surely, 2^681667232 is an apocalyptic number.

It is an amenable number.

681667232 is a deficient number, since it is larger than the sum of its proper divisors (661133920).

681667232 is a wasteful number, since it uses less digits than its factorization.

681667232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12212 (or 12204 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 681667232 is about 26108.7577643978. The cubic root of 681667232 is about 880.0840277889.

The spelling of 681667232 in words is "six hundred eighty-one million, six hundred sixty-seven thousand, two hundred thirty-two".