165500011 has 2 divisors, whose sum is σ = 165500012. Its totient is φ = 165500010.

The previous prime is 165499993. The next prime is 165500017. The reversal of 165500011 is 110005561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165500011 - 2¹³ = 165491819 is a prime.

It is not a weakly prime, because it can be changed into another prime (165500017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82750005 + 82750006.

It is an arithmetic number, because the mean of its divisors is an integer number (82750006).

Almost surely, 2^165500011 is an apocalyptic number.

165500011 is a deficient number, since it is larger than the sum of its proper divisors (1).

165500011 is an equidigital number, since it uses as much as digits as its factorization.

165500011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 165500011 is about 12864.6807577957. The cubic root of 165500011 is about 549.0341295942.

Adding to 165500011 its reverse (110005561), we get a palindrome (275505572).

The spelling of 165500011 in words is "one hundred sixty-five million, five hundred thousand, eleven".