680080849 has 20 divisors (see below), whose sum is σ = 799125300. Its totient is φ = 578709600.

The previous prime is 680080811. The next prime is 680080861. The reversal of 680080849 is 948080086.

It can be written as a sum of positive squares in 2 ways, for example, as 67765824 + 612315025 = 8232^2 + 24745^2 .

It is not a de Polignac number, because 680080849 - 2¹¹ = 680078801 is a prime.

It is a super-2 number, since 2×680080849² = 925019922353121602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680080549) 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 in 19 ways as a sum of consecutive naturals, for example, 356799 + ... + 358699.

It is an arithmetic number, because the mean of its divisors is an integer number (39956265).

Almost surely, 2^680080849 is an apocalyptic number.

It is an amenable number.

680080849 is a deficient number, since it is larger than the sum of its proper divisors (119044451).

680080849 is an equidigital number, since it uses as much as digits as its factorization.

680080849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078 (or 2057 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 680080849 is about 26078.3597835447. The cubic root of 680080849 is about 879.4007839605.

The spelling of 680080849 in words is "six hundred eighty million, eighty thousand, eight hundred forty-nine".