720281660 has 48 divisors (see below), whose sum is σ = 1761310656. Its totient is φ = 242291712.

The previous prime is 720281657. The next prime is 720281677. The reversal of 720281660 is 66182027.

720281660 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 15 ways as a sum of consecutive naturals, for example, 41117 + ... + 55956.

It is an arithmetic number, because the mean of its divisors is an integer number (36693972).

Almost surely, 2^720281660 is an apocalyptic number.

720281660 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

720281660 is an abundant number, since it is smaller than the sum of its proper divisors (1041028996).

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

720281660 is a wasteful number, since it uses less digits than its factorization.

720281660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97142 (or 97140 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 720281660 is about 26838.0636410304. The cubic root of 720281660 is about 896.3978074507.

The spelling of 720281660 in words is "seven hundred twenty million, two hundred eighty-one thousand, six hundred sixty".