680256704 has 42 divisors (see below), whose sum is σ = 1362661740. Its totient is φ = 336938112.

The previous prime is 680256679. The next prime is 680256713. The reversal of 680256704 is 407652086.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1031927 + ... + 1032585.

Almost surely, 2^680256704 is an apocalyptic number.

680256704 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 680256704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (681330870).

680256704 is an abundant number, since it is smaller than the sum of its proper divisors (682405036).

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

680256704 is an equidigital number, since it uses as much as digits as its factorization.

680256704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925 (or 788 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 680256704 is about 26081.7312308827. The cubic root of 680256704 is about 879.4765757812.

The spelling of 680256704 in words is "six hundred eighty million, two hundred fifty-six thousand, seven hundred four".