163665633 has 8 divisors (see below), whose sum is σ = 218295648. Its totient is φ = 109073024.

The previous prime is 163665617. The next prime is 163665659. The reversal of 163665633 is 336566361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163665633 - 2⁴ = 163665617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163665591 and 163665600.

It is not an unprimeable number, because it can be changed into a prime (163665533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3310 + ... + 18392.

It is an arithmetic number, because the mean of its divisors is an integer number (27286956).

Almost surely, 2^163665633 is an apocalyptic number.

It is an amenable number.

163665633 is a deficient number, since it is larger than the sum of its proper divisors (54630015).

163665633 is a wasteful number, since it uses less digits than its factorization.

163665633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18703.

The product of its digits is 174960, while the sum is 39.

The square root of 163665633 is about 12793.1869758868. The cubic root of 163665633 is about 546.9981172516.

The spelling of 163665633 in words is "one hundred sixty-three million, six hundred sixty-five thousand, six hundred thirty-three".