165330663 has 4 divisors (see below), whose sum is σ = 220440888. Its totient is φ = 110220440.

The previous prime is 165330643. The next prime is 165330673. The reversal of 165330663 is 366033561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165330663 - 2²⁰ = 164282087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165330623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27555108 + ... + 27555113.

It is an arithmetic number, because the mean of its divisors is an integer number (55110222).

Almost surely, 2^165330663 is an apocalyptic number.

165330663 is a deficient number, since it is larger than the sum of its proper divisors (55110225).

165330663 is an equidigital number, since it uses as much as digits as its factorization.

165330663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55110224.

The product of its (nonzero) digits is 29160, while the sum is 33.

The square root of 165330663 is about 12858.0971764877. The cubic root of 165330663 is about 548.8467991675.

The spelling of 165330663 in words is "one hundred sixty-five million, three hundred thirty thousand, six hundred sixty-three".