680724650 has 12 divisors (see below), whose sum is σ = 1266147942. Its totient is φ = 272289840.

The previous prime is 680724643. The next prime is 680724661. The reversal of 680724650 is 56427086.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 267944161 + 412780489 = 16369^2 + 20317^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6807197 + ... + 6807296.

Almost surely, 2^680724650 is an apocalyptic number.

680724650 is a deficient number, since it is larger than the sum of its proper divisors (585423292).

680724650 is a wasteful number, since it uses less digits than its factorization.

680724650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13614505 (or 13614500 counting only the distinct ones).

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

The square root of 680724650 is about 26090.7004505437. The cubic root of 680724650 is about 879.6781924219.

The spelling of 680724650 in words is "six hundred eighty million, seven hundred twenty-four thousand, six hundred fifty".