163668101 has 2 divisors, whose sum is σ = 163668102. Its totient is φ = 163668100.

The previous prime is 163668077. The next prime is 163668103. The reversal of 163668101 is 101866361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120450625 + 43217476 = 10975^2 + 6574^2 .

It is a cyclic number.

It is not a de Polignac number, because 163668101 - 2¹⁴ = 163651717 is a prime.

It is a Sophie Germain prime.

Together with 163668103, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163668103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81834050 + 81834051.

It is an arithmetic number, because the mean of its divisors is an integer number (81834051).

Almost surely, 2^163668101 is an apocalyptic number.

It is an amenable number.

163668101 is a deficient number, since it is larger than the sum of its proper divisors (1).

163668101 is an equidigital number, since it uses as much as digits as its factorization.

163668101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 163668101 is about 12793.2834331144. The cubic root of 163668101 is about 547.0008667283. Note that the first 3 decimals are identical.

The spelling of 163668101 in words is "one hundred sixty-three million, six hundred sixty-eight thousand, one hundred one".