163663533 has 12 divisors (see below), whose sum is σ = 257894208. Its totient is φ = 99189960.

The previous prime is 163663519. The next prime is 163663553. The reversal of 163663533 is 335366361.

163663533 is a `hidden beast` number, since 1 + 63 + 6 + 63 + 533 = 666.

163663533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163663533 - 2²¹ = 161566381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163663553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 826485 + ... + 826682.

It is an arithmetic number, because the mean of its divisors is an integer number (21491184).

Almost surely, 2^163663533 is an apocalyptic number.

It is an amenable number.

163663533 is a deficient number, since it is larger than the sum of its proper divisors (94230675).

163663533 is a wasteful number, since it uses less digits than its factorization.

163663533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653184 (or 1653181 counting only the distinct ones).

The product of its digits is 87480, while the sum is 36.

The square root of 163663533 is about 12793.1049006877. The cubic root of 163663533 is about 546.9957777236.

The spelling of 163663533 in words is "one hundred sixty-three million, six hundred sixty-three thousand, five hundred thirty-three".