663516747 has 6 divisors (see below), whose sum is σ = 958413092. Its totient is φ = 442344492.

The previous prime is 663516739. The next prime is 663516751. The reversal of 663516747 is 747615366.

663516747 is a `hidden beast` number, since 6 + 63 + 516 + 74 + 7 = 666.

It is not a de Polignac number, because 663516747 - 2³ = 663516739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663516047) 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, 36862033 + ... + 36862050.

Almost surely, 2^663516747 is an apocalyptic number.

663516747 is a deficient number, since it is larger than the sum of its proper divisors (294896345).

663516747 is a wasteful number, since it uses less digits than its factorization.

663516747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73724089 (or 73724086 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 663516747 is about 25758.8188199692. The cubic root of 663516747 is about 872.2024379722.

The spelling of 663516747 in words is "six hundred sixty-three million, five hundred sixteen thousand, seven hundred forty-seven".