720197660 has 192 divisors, whose sum is σ = 1998259200. Its totient is φ = 211673088.

The previous prime is 720197657. The next prime is 720197749. The reversal of 720197660 is 66791027.

720197660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2040044 + ... + 2040396.

It is an arithmetic number, because the mean of its divisors is an integer number (10407600).

Almost surely, 2^720197660 is an apocalyptic number.

720197660 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720197660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (999129600).

720197660 is an abundant number, since it is smaller than the sum of its proper divisors (1278061540).

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

720197660 is a wasteful number, since it uses less digits than its factorization.

720197660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 720197660 is about 26836.4986538855. The cubic root of 720197660 is about 896.3629598129.

The spelling of 720197660 in words is "seven hundred twenty million, one hundred ninety-seven thousand, six hundred sixty".