680446672 has 10 divisors (see below), whose sum is σ = 1318365458. Its totient is φ = 340223328.

The previous prime is 680446661. The next prime is 680446673. The reversal of 680446672 is 276644086.

It can be written as a sum of positive squares in only one way, i.e., 629809216 + 50637456 = 25096^2 + 7116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680446673) 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 as a sum of consecutive naturals, namely, 21263943 + ... + 21263974.

Almost surely, 2^680446672 is an apocalyptic number.

It is an amenable number.

680446672 is a deficient number, since it is larger than the sum of its proper divisors (637918786).

680446672 is a wasteful number, since it uses less digits than its factorization.

680446672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42527925 (or 42527919 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 680446672 is about 26085.3727594604. The cubic root of 680446672 is about 879.5584354946.

The spelling of 680446672 in words is "six hundred eighty million, four hundred forty-six thousand, six hundred seventy-two".