680663424 has 128 divisors (see below), whose sum is σ = 2083150080. Its totient is φ = 192890880.

The previous prime is 680663419. The next prime is 680663441. The reversal of 680663424 is 424366086.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351162 + ... + 353094.

It is an arithmetic number, because the mean of its divisors is an integer number (16274610).

Almost surely, 2^680663424 is an apocalyptic number.

680663424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680663424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041575040).

680663424 is an abundant number, since it is smaller than the sum of its proper divisors (1402486656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

680663424 is a wasteful number, since it uses less digits than its factorization.

680663424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088 (or 2076 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

The square root of 680663424 is about 26089.5270942192. The cubic root of 680663424 is about 879.6518181790.

The spelling of 680663424 in words is "six hundred eighty million, six hundred sixty-three thousand, four hundred twenty-four".