1663563924 has 72 divisors (see below), whose sum is σ = 4828867680. Its totient is φ = 477576000.

The previous prime is 1663563899. The next prime is 1663563959. The reversal of 1663563924 is 4293653661.

1663563924 is a `hidden beast` number, since 1 + 6 + 6 + 3 + 5 + 639 + 2 + 4 = 666.

1663563924 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1663563924.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103027 + ... + 118074.

Almost surely, 2^1663563924 is an apocalyptic number.

It is an amenable number.

1663563924 is an abundant number, since it is smaller than the sum of its proper divisors (3165303756).

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

1663563924 is a wasteful number, since it uses less digits than its factorization.

1663563924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221141 (or 221136 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 1663563924 is about 40786.8106622717. The cubic root of 1663563924 is about 1184.8949028194.

The spelling of 1663563924 in words is "one billion, six hundred sixty-three million, five hundred sixty-three thousand, nine hundred twenty-four".