665154163 has 2 divisors, whose sum is σ = 665154164. Its totient is φ = 665154162.

The previous prime is 665154157. The next prime is 665154169. The reversal of 665154163 is 361451566.

It is a balanced prime because it is at equal distance from previous prime (665154157) and next prime (665154169).

It is a cyclic number.

It is not a de Polignac number, because 665154163 - 2⁵ = 665154131 is a prime.

It is not a weakly prime, because it can be changed into another prime (665154169) 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 as a sum of consecutive naturals, namely, 332577081 + 332577082.

It is an arithmetic number, because the mean of its divisors is an integer number (332577082).

Almost surely, 2^665154163 is an apocalyptic number.

665154163 is a deficient number, since it is larger than the sum of its proper divisors (1).

665154163 is an equidigital number, since it uses as much as digits as its factorization.

665154163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 665154163 is about 25790.5828356011. The cubic root of 665154163 is about 872.9193176622.

The spelling of 665154163 in words is "six hundred sixty-five million, one hundred fifty-four thousand, one hundred sixty-three".