720116660 has 24 divisors (see below), whose sum is σ = 1577995776. Its totient is φ = 275522720.

The previous prime is 720116659. The next prime is 720116669. The reversal of 720116660 is 66611027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720116669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782276 + ... + 783195.

It is an arithmetic number, because the mean of its divisors is an integer number (65749824).

Almost surely, 2^720116660 is an apocalyptic number.

It is an amenable number.

720116660 is an abundant number, since it is smaller than the sum of its proper divisors (857879116).

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

720116660 is a wasteful number, since it uses less digits than its factorization.

720116660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565503 (or 1565501 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 720116660 is about 26834.9894727015. The cubic root of 720116660 is about 896.3293541674.

Adding to 720116660 its reverse (66611027), we get a palindrome (786727687).

The spelling of 720116660 in words is "seven hundred twenty million, one hundred sixteen thousand, six hundred sixty".