663414228 has 18 divisors (see below), whose sum is σ = 1676963834. Its totient is φ = 221138064.

The previous prime is 663414211. The next prime is 663414247. The reversal of 663414228 is 822414366.

663414228 is a `hidden beast` number, since 6 + 634 + 14 + 2 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 530288784 + 133125444 = 23028^2 + 11538^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 18428173 = 663414228 / (6 + 6 + 3 + 4 + 1 + 4 + 2 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 663414192 and 663414201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9214051 + ... + 9214122.

Almost surely, 2^663414228 is an apocalyptic number.

It is an amenable number.

663414228 is an abundant number, since it is smaller than the sum of its proper divisors (1013549606).

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

663414228 is a wasteful number, since it uses less digits than its factorization.

663414228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428183 (or 18428178 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 663414228 is about 25756.8287644267. The cubic root of 663414228 is about 872.1575147517.

The spelling of 663414228 in words is "six hundred sixty-three million, four hundred fourteen thousand, two hundred twenty-eight".