163665297 has 12 divisors (see below), whose sum is σ = 248848080. Its totient is φ = 103367448.

The previous prime is 163665289. The next prime is 163665311. The reversal of 163665297 is 792566361.

163665297 is a `hidden beast` number, since 1 + 63 + 66 + 529 + 7 = 666.

It is not a de Polignac number, because 163665297 - 2³ = 163665289 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (163665277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 478383 + ... + 478724.

It is an arithmetic number, because the mean of its divisors is an integer number (20737340).

Almost surely, 2^163665297 is an apocalyptic number.

It is an amenable number.

163665297 is a deficient number, since it is larger than the sum of its proper divisors (85182783).

163665297 is a wasteful number, since it uses less digits than its factorization.

163665297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957132 (or 957129 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 163665297 is about 12793.1738438903. The cubic root of 163665297 is about 546.9977429285.

The spelling of 163665297 in words is "one hundred sixty-three million, six hundred sixty-five thousand, two hundred ninety-seven".