720785767 has 16 divisors (see below), whose sum is σ = 821288160. Its totient is φ = 627080832.

The previous prime is 720785731. The next prime is 720785777. The reversal of 720785767 is 767587027.

It is a cyclic number.

It is not a de Polignac number, because 720785767 - 2²⁷ = 586568039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 720785767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720785777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41253 + ... + 56065.

It is an arithmetic number, because the mean of its divisors is an integer number (51330510).

Almost surely, 2^720785767 is an apocalyptic number.

720785767 is a deficient number, since it is larger than the sum of its proper divisors (100502393).

720785767 is a wasteful number, since it uses less digits than its factorization.

720785767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15042.

The product of its (nonzero) digits is 1152480, while the sum is 49.

The square root of 720785767 is about 26847.4536408949. The cubic root of 720785767 is about 896.6068807691.

The spelling of 720785767 in words is "seven hundred twenty million, seven hundred eighty-five thousand, seven hundred sixty-seven".