720745567 has 8 divisors (see below), whose sum is σ = 747896832. Its totient is φ = 693838200.

The previous prime is 720745559. The next prime is 720745573. The reversal of 720745567 is 765547027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 720745567 - 2³ = 720745559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720745537) 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, 54943 + ... + 66784.

It is an arithmetic number, because the mean of its divisors is an integer number (93487104).

Almost surely, 2^720745567 is an apocalyptic number.

720745567 is a deficient number, since it is larger than the sum of its proper divisors (27151265).

720745567 is a wasteful number, since it uses less digits than its factorization.

720745567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121949.

The product of its (nonzero) digits is 411600, while the sum is 43.

The square root of 720745567 is about 26846.7049561022. The cubic root of 720745567 is about 896.5902118002.

The spelling of 720745567 in words is "seven hundred twenty million, seven hundred forty-five thousand, five hundred sixty-seven".