680446643 has 4 divisors (see below), whose sum is σ = 691601568. Its totient is φ = 669291720.

The previous prime is 680446631. The next prime is 680446649. The reversal of 680446643 is 346644086.

680446643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 680446643 - 2²⁴ = 663669427 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 680446643.

It is not an unprimeable number, because it can be changed into a prime (680446649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5577371 + ... + 5577492.

It is an arithmetic number, because the mean of its divisors is an integer number (172900392).

Almost surely, 2^680446643 is an apocalyptic number.

680446643 is a deficient number, since it is larger than the sum of its proper divisors (11154925).

680446643 is a wasteful number, since it uses less digits than its factorization.

680446643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11154924.

The product of its (nonzero) digits is 331776, while the sum is 41.

The square root of 680446643 is about 26085.3722035933. The cubic root of 680446643 is about 879.5584229992.

The spelling of 680446643 in words is "six hundred eighty million, four hundred forty-six thousand, six hundred forty-three".