663673536 has 126 divisors (see below), whose sum is σ = 1940935412. Its totient is φ = 216817920.

The previous prime is 663673471. The next prime is 663673541. The reversal of 663673536 is 635376366.

663673536 is a `hidden beast` number, since 6 + 636 + 7 + 3 + 5 + 3 + 6 = 666.

663673536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 663673491 and 663673500.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2004891 + ... + 2005221.

Almost surely, 2^663673536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663673536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970467706).

663673536 is an abundant number, since it is smaller than the sum of its proper divisors (1277261876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663673536 is a wasteful number, since it uses less digits than its factorization.

663673536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 395 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 45.

The square root of 663673536 is about 25761.8620445029. The cubic root of 663673536 is about 872.2711330371.

The spelling of 663673536 in words is "six hundred sixty-three million, six hundred seventy-three thousand, five hundred thirty-six".