665223504163 has 8 divisors (see below), whose sum is σ = 713447254800. Its totient is φ = 618320952288.

The previous prime is 665223504161. The next prime is 665223504217. The reversal of 665223504163 is 361405322566.

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 665223504163 - 2¹ = 665223504161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665223504161) 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 7 ways as a sum of consecutive naturals, for example, 330298648 + ... + 330300661.

It is an arithmetic number, because the mean of its divisors is an integer number (89180906850).

Almost surely, 2^665223504163 is an apocalyptic number.

665223504163 is a deficient number, since it is larger than the sum of its proper divisors (48223750637).

665223504163 is a wasteful number, since it uses less digits than its factorization.

665223504163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660599381.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 665223504163 in words is "six hundred sixty-five billion, two hundred twenty-three million, five hundred four thousand, one hundred sixty-three".