165968356 has 6 divisors (see below), whose sum is σ = 290444630. Its totient is φ = 82984176.

The previous prime is 165968353. The next prime is 165968359. The reversal of 165968356 is 653869561.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (165968353) and next prime (165968359).

It can be written as a sum of positive squares in only one way, i.e., 159617956 + 6350400 = 12634^2 + 2520^2 .

It is not an unprimeable number, because it can be changed into a prime (165968353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20746041 + ... + 20746048.

Almost surely, 2^165968356 is an apocalyptic number.

It is an amenable number.

165968356 is a deficient number, since it is larger than the sum of its proper divisors (124476274).

165968356 is a wasteful number, since it uses less digits than its factorization.

165968356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41492093 (or 41492091 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 49.

The square root of 165968356 is about 12882.8706428342. The cubic root of 165968356 is about 549.5515418743.

The spelling of 165968356 in words is "one hundred sixty-five million, nine hundred sixty-eight thousand, three hundred fifty-six".