620720065 has 32 divisors (see below), whose sum is σ = 912280320. Its totient is φ = 395741184.

The previous prime is 620720059. The next prime is 620720069. The reversal of 620720065 is 560027026.

It is a cyclic number.

It is not a de Polignac number, because 620720065 - 2⁷ = 620719937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620720069) 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 31 ways as a sum of consecutive naturals, for example, 43101 + ... + 55669.

It is an arithmetic number, because the mean of its divisors is an integer number (28508760).

Almost surely, 2^620720065 is an apocalyptic number.

It is an amenable number.

620720065 is a deficient number, since it is larger than the sum of its proper divisors (291560255).

620720065 is a wasteful number, since it uses less digits than its factorization.

620720065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12681.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 620720065 is about 24914.2542533386. The cubic root of 620720065 is about 853.0318785682.

The spelling of 620720065 in words is "six hundred twenty million, seven hundred twenty thousand, sixty-five".