165416761 has 2 divisors, whose sum is σ = 165416762. Its totient is φ = 165416760.

The previous prime is 165416737. The next prime is 165416767. The reversal of 165416761 is 167614561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159870736 + 5546025 = 12644^2 + 2355^2 .

It is a cyclic number.

It is not a de Polignac number, because 165416761 - 2¹¹ = 165414713 is a prime.

It is a super-2 number, since 2×165416761² = 54725409639462242, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 165416761.

It is not a weakly prime, because it can be changed into another prime (165416767) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82708380 + 82708381.

It is an arithmetic number, because the mean of its divisors is an integer number (82708381).

Almost surely, 2^165416761 is an apocalyptic number.

It is an amenable number.

165416761 is a deficient number, since it is larger than the sum of its proper divisors (1).

165416761 is an equidigital number, since it uses as much as digits as its factorization.

165416761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 165416761 is about 12861.4447477723. Note that the first 3 decimals coincide. The cubic root of 165416761 is about 548.9420555675.

The spelling of 165416761 in words is "one hundred sixty-five million, four hundred sixteen thousand, seven hundred sixty-one".