680640583 has 16 divisors (see below), whose sum is σ = 794327040. Its totient is φ = 571196736.

The previous prime is 680640563. The next prime is 680640613. The reversal of 680640583 is 385046086.

It is a cyclic number.

It is not a de Polignac number, because 680640583 - 2⁵ = 680640551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680640563) by changing a digit.

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, 58866 + ... + 69472.

It is an arithmetic number, because the mean of its divisors is an integer number (49645440).

Almost surely, 2^680640583 is an apocalyptic number.

680640583 is a deficient number, since it is larger than the sum of its proper divisors (113686457).

680640583 is a wasteful number, since it uses less digits than its factorization.

680640583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10806.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 680640583 is about 26089.0893478481. The cubic root of 680640583 is about 879.6419785866.

The spelling of 680640583 in words is "six hundred eighty million, six hundred forty thousand, five hundred eighty-three".