163665499 has 2 divisors, whose sum is σ = 163665500. Its totient is φ = 163665498.

The previous prime is 163665451. The next prime is 163665517. The reversal of 163665499 is 994566361.

163665499 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 163665499 - 2⁷ = 163665371 is a prime.

It is not a weakly prime, because it can be changed into another prime (163665419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81832749 + 81832750.

It is an arithmetic number, because the mean of its divisors is an integer number (81832750).

Almost surely, 2^163665499 is an apocalyptic number.

163665499 is a deficient number, since it is larger than the sum of its proper divisors (1).

163665499 is an equidigital number, since it uses as much as digits as its factorization.

163665499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 49.

The square root of 163665499 is about 12793.1817387232. The cubic root of 163665499 is about 546.9979679680.

The spelling of 163665499 in words is "one hundred sixty-three million, six hundred sixty-five thousand, four hundred ninety-nine".