165651041 has 2 divisors, whose sum is σ = 165651042. Its totient is φ = 165651040.

The previous prime is 165650993. The next prime is 165651047. The reversal of 165651041 is 140156561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165379600 + 271441 = 12860^2 + 521^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165651041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165650995 and 165651013.

It is not a weakly prime, because it can be changed into another prime (165651047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82825520 + 82825521.

It is an arithmetic number, because the mean of its divisors is an integer number (82825521).

Almost surely, 2^165651041 is an apocalyptic number.

It is an amenable number.

165651041 is a deficient number, since it is larger than the sum of its proper divisors (1).

165651041 is an equidigital number, since it uses as much as digits as its factorization.

165651041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 165651041 is about 12870.5493666743. The cubic root of 165651041 is about 549.2010891275.

The spelling of 165651041 in words is "one hundred sixty-five million, six hundred fifty-one thousand, forty-one".