663570073 has 8 divisors (see below), whose sum is σ = 676389896. Its totient is φ = 650851200.

The previous prime is 663570071. The next prime is 663570157. The reversal of 663570073 is 370075366.

663570073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8363664 + 655206409 = 2892^2 + 25597^2 .

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 663570073 - 2¹ = 663570071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663570071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11898 + ... + 38323.

It is an arithmetic number, because the mean of its divisors is an integer number (84548737).

Almost surely, 2^663570073 is an apocalyptic number.

It is an amenable number.

663570073 is a deficient number, since it is larger than the sum of its proper divisors (12819823).

663570073 is a wasteful number, since it uses less digits than its factorization.

663570073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50475.

The product of its (nonzero) digits is 79380, while the sum is 37.

The square root of 663570073 is about 25759.8539009832. The cubic root of 663570073 is about 872.2258032811.

The spelling of 663570073 in words is "six hundred sixty-three million, five hundred seventy thousand, seventy-three".