165364663 has 4 divisors (see below), whose sum is σ = 166881880. Its totient is φ = 163847448.

The previous prime is 165364649. The next prime is 165364673. The reversal of 165364663 is 366463561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366463561 = 151 ⋅2426911.

It is a cyclic number.

It is not a de Polignac number, because 165364663 - 2⁵ = 165364631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165364613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758445 + ... + 758662.

It is an arithmetic number, because the mean of its divisors is an integer number (41720470).

Almost surely, 2^165364663 is an apocalyptic number.

165364663 is a deficient number, since it is larger than the sum of its proper divisors (1517217).

165364663 is a wasteful number, since it uses less digits than its factorization.

165364663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517216.

The product of its digits is 233280, while the sum is 40.

The square root of 165364663 is about 12859.4192326092. The cubic root of 165364663 is about 548.8844197593.

The spelling of 165364663 in words is "one hundred sixty-five million, three hundred sixty-four thousand, six hundred sixty-three".