720000066 has 32 divisors (see below), whose sum is σ = 1473303168. Its totient is φ = 234510080.

The previous prime is 720000059. The next prime is 720000067. The reversal of 720000066 is 660000027.

It is a junction number, because it is equal to n+sod(n) for n = 719999997 and 720000051.

It is not an unprimeable number, because it can be changed into a prime (720000067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40660 + ... + 55616.

It is an arithmetic number, because the mean of its divisors is an integer number (46040724).

Almost surely, 2^720000066 is an apocalyptic number.

720000066 is an abundant number, since it is smaller than the sum of its proper divisors (753303102).

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

720000066 is a wasteful number, since it uses less digits than its factorization.

720000066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15146.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 720000066 is about 26832.8169598348. The cubic root of 720000066 is about 896.2809766978.

The spelling of 720000066 in words is "seven hundred twenty million, sixty-six", and thus it is an aban number.