78669163 has 2 divisors, whose sum is σ = 78669164. Its totient is φ = 78669162.

The previous prime is 78669127. The next prime is 78669167. The reversal of 78669163 is 36196687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78669163 - 2¹⁷ = 78538091 is a prime.

It is not a weakly prime, because it can be changed into another prime (78669167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39334581 + 39334582.

It is an arithmetic number, because the mean of its divisors is an integer number (39334582).

Almost surely, 2^78669163 is an apocalyptic number.

78669163 is a deficient number, since it is larger than the sum of its proper divisors (1).

78669163 is an equidigital number, since it uses as much as digits as its factorization.

78669163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 78669163 is about 8869.5638562446. The cubic root of 78669163 is about 428.4842304554.

The spelling of 78669163 in words is "seventy-eight million, six hundred sixty-nine thousand, one hundred sixty-three".