663633243 has 48 divisors (see below), whose sum is σ = 1223529216. Its totient is φ = 350036640.

The previous prime is 663633241. The next prime is 663633247. The reversal of 663633243 is 342336366.

It is not a de Polignac number, because 663633243 - 2¹ = 663633241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663633198 and 663633207.

It is not an unprimeable number, because it can be changed into a prime (663633241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7108 + ... + 37118.

It is an arithmetic number, because the mean of its divisors is an integer number (25490192).

Almost surely, 2^663633243 is an apocalyptic number.

663633243 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

663633243 is a deficient number, since it is larger than the sum of its proper divisors (559895973).

663633243 is a wasteful number, since it uses less digits than its factorization.

663633243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30046 (or 30034 counting only the distinct ones).

The product of its digits is 139968, while the sum is 36.

The square root of 663633243 is about 25761.0800045340. The cubic root of 663633243 is about 872.2534802152.

The spelling of 663633243 in words is "six hundred sixty-three million, six hundred thirty-three thousand, two hundred forty-three".