720680650 has 24 divisors (see below), whose sum is σ = 1346240844. Its totient is φ = 287030400.

The previous prime is 720680647. The next prime is 720680669. The reversal of 720680650 is 56086027.

It can be written as a sum of positive squares in 6 ways, for example, as 129072321 + 591608329 = 11361^2 + 24323^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19281 + ... + 42580.

Almost surely, 2^720680650 is an apocalyptic number.

720680650 is a deficient number, since it is larger than the sum of its proper divisors (625560194).

720680650 is a wasteful number, since it uses less digits than its factorization.

720680650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62106 (or 62101 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 720680650 is about 26845.4958978224. The cubic root of 720680650 is about 896.5632925946.

The spelling of 720680650 in words is "seven hundred twenty million, six hundred eighty thousand, six hundred fifty".