665913163 has 2 divisors, whose sum is σ = 665913164. Its totient is φ = 665913162.

The previous prime is 665913119. The next prime is 665913169. The reversal of 665913163 is 361319566.

665913163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665913163 - 2¹³ = 665904971 is a prime.

It is equal to p_34577374 and since 665913163 and 34577374 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (665913169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332956581 + 332956582.

It is an arithmetic number, because the mean of its divisors is an integer number (332956582).

Almost surely, 2^665913163 is an apocalyptic number.

665913163 is a deficient number, since it is larger than the sum of its proper divisors (1).

665913163 is an equidigital number, since it uses as much as digits as its factorization.

665913163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 40.

The square root of 665913163 is about 25805.2933135820. The cubic root of 665913163 is about 873.2512176190.

The spelling of 665913163 in words is "six hundred sixty-five million, nine hundred thirteen thousand, one hundred sixty-three".