663545628 has 24 divisors (see below), whose sum is σ = 1720303760. Its totient is φ = 221181840.

The previous prime is 663545611. The next prime is 663545629. The reversal of 663545628 is 826545366.

663545628 is a `hidden beast` number, since 6 + 635 + 4 + 5 + 6 + 2 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663545629) 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, 3071863 + ... + 3072078.

Almost surely, 2^663545628 is an apocalyptic number.

It is an amenable number.

663545628 is an abundant number, since it is smaller than the sum of its proper divisors (1056758132).

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

663545628 is a wasteful number, since it uses less digits than its factorization.

663545628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6143954 (or 6143946 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 663545628 is about 25759.3794179906. The cubic root of 663545628 is about 872.2150926204.

The spelling of 663545628 in words is "six hundred sixty-three million, five hundred forty-five thousand, six hundred twenty-eight".