663056073 has 6 divisors (see below), whose sum is σ = 957747674. Its totient is φ = 442037376.

The previous prime is 663056071. The next prime is 663056077. The reversal of 663056073 is 370650366.

663056073 is a `hidden beast` number, since 66 + 30 + 560 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 546998544 + 116057529 = 23388^2 + 10773^2 .

It is not a de Polignac number, because 663056073 - 2¹ = 663056071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663056071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36836440 + ... + 36836457.

Almost surely, 2^663056073 is an apocalyptic number.

It is an amenable number.

663056073 is a deficient number, since it is larger than the sum of its proper divisors (294691601).

663056073 is a wasteful number, since it uses less digits than its factorization.

663056073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73672903 (or 73672900 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 36.

The square root of 663056073 is about 25749.8752035811. The cubic root of 663056073 is about 872.0005370090. Note that the first 3 decimals are identical.

The spelling of 663056073 in words is "six hundred sixty-three million, fifty-six thousand, seventy-three".