33660161 has 2 divisors, whose sum is σ = 33660162. Its totient is φ = 33660160.

The previous prime is 33660157. The next prime is 33660163. The reversal of 33660161 is 16106633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18105025 + 15555136 = 4255^2 + 3944^2 .

It is a cyclic number.

It is not a de Polignac number, because 33660161 - 2² = 33660157 is a prime.

It is a super-2 number, since 2×33660161² = 2266012877091842, which contains 22 as substring.

Together with 33660163, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33660161.

It is not a weakly prime, because it can be changed into another prime (33660163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16830080 + 16830081.

It is an arithmetic number, because the mean of its divisors is an integer number (16830081).

Almost surely, 2^33660161 is an apocalyptic number.

It is an amenable number.

33660161 is a deficient number, since it is larger than the sum of its proper divisors (1).

33660161 is an equidigital number, since it uses as much as digits as its factorization.

33660161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 33660161 is about 5801.7377569139. The cubic root of 33660161 is about 322.8782046141.

Adding to 33660161 its reverse (16106633), we get a palindrome (49766794).

The spelling of 33660161 in words is "thirty-three million, six hundred sixty thousand, one hundred sixty-one".