680249770 has 16 divisors (see below), whose sum is σ = 1241224200. Its totient is φ = 268372224.

The previous prime is 680249743. The next prime is 680249789. The reversal of 680249770 is 77942086.

It can be written as a sum of positive squares in 4 ways, for example, as 353327209 + 326922561 = 18797^2 + 18081^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465195 + ... + 466654.

Almost surely, 2^680249770 is an apocalyptic number.

680249770 is a deficient number, since it is larger than the sum of its proper divisors (560974430).

680249770 is a wasteful number, since it uses less digits than its factorization.

680249770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931929.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 680249770 is about 26081.5983022513. The cubic root of 680249770 is about 879.4735875410.

The spelling of 680249770 in words is "six hundred eighty million, two hundred forty-nine thousand, seven hundred seventy".