665133163 has 4 divisors (see below), whose sum is σ = 670370560. Its totient is φ = 659895768.

The previous prime is 665133121. The next prime is 665133181. The reversal of 665133163 is 361331566.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665133163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665133263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2618508 + ... + 2618761.

It is an arithmetic number, because the mean of its divisors is an integer number (167592640).

Almost surely, 2^665133163 is an apocalyptic number.

665133163 is a deficient number, since it is larger than the sum of its proper divisors (5237397).

665133163 is a wasteful number, since it uses less digits than its factorization.

665133163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237396.

The product of its digits is 29160, while the sum is 34.

The square root of 665133163 is about 25790.1757070401. The cubic root of 665133163 is about 872.9101310708.

The spelling of 665133163 in words is "six hundred sixty-five million, one hundred thirty-three thousand, one hundred sixty-three".