663606447 has 8 divisors (see below), whose sum is σ = 1011209856. Its totient is φ = 379203672.

The previous prime is 663606421. The next prime is 663606457. The reversal of 663606447 is 744606366.

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

It is not a de Polignac number, because 663606447 - 2⁷ = 663606319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663606399 and 663606408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663606457) 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, 15800133 + ... + 15800174.

It is an arithmetic number, because the mean of its divisors is an integer number (126401232).

Almost surely, 2^663606447 is an apocalyptic number.

663606447 is a deficient number, since it is larger than the sum of its proper divisors (347603409).

663606447 is a wasteful number, since it uses less digits than its factorization.

663606447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31600317.

The product of its (nonzero) digits is 435456, while the sum is 42.

The square root of 663606447 is about 25760.5599123932. The cubic root of 663606447 is about 872.2417401871.

The spelling of 663606447 in words is "six hundred sixty-three million, six hundred six thousand, four hundred forty-seven".