610720660 has 24 divisors (see below), whose sum is σ = 1399106016. Its totient is φ = 222080160.

The previous prime is 610720637. The next prime is 610720687. The reversal of 610720660 is 66027016.

610720660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 1387782 + ... + 1388221.

It is an arithmetic number, because the mean of its divisors is an integer number (58296084).

Almost surely, 2^610720660 is an apocalyptic number.

It is an amenable number.

610720660 is an abundant number, since it is smaller than the sum of its proper divisors (788385356).

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

610720660 is a wasteful number, since it uses less digits than its factorization.

610720660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776023 (or 2776021 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 610720660 is about 24712.7630992570. The cubic root of 610720660 is about 848.4264590620.

Adding to 610720660 its reverse (66027016), we get a palindrome (676747676).

The spelling of 610720660 in words is "six hundred ten million, seven hundred twenty thousand, six hundred sixty".