720066540 has 24 divisors (see below), whose sum is σ = 2016186480. Its totient is φ = 192017728.

The previous prime is 720066517. The next prime is 720066547. The reversal of 720066540 is 45660027.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 720066498 and 720066507.

It is not an unprimeable number, because it can be changed into a prime (720066547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6000495 + ... + 6000614.

It is an arithmetic number, because the mean of its divisors is an integer number (84007770).

Almost surely, 2^720066540 is an apocalyptic number.

It is an amenable number.

720066540 is an abundant number, since it is smaller than the sum of its proper divisors (1296119940).

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

720066540 is a wasteful number, since it uses less digits than its factorization.

720066540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12001121 (or 12001119 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 720066540 is about 26834.0556010455. The cubic root of 720066540 is about 896.3085588935.

The spelling of 720066540 in words is "seven hundred twenty million, sixty-six thousand, five hundred forty".