165613330111 has 2 divisors, whose sum is σ = 165613330112. Its totient is φ = 165613330110.

The previous prime is 165613330027. The next prime is 165613330147. The reversal of 165613330111 is 111033316561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165613330111 - 2¹³ = 165613321919 is a prime.

It is a super-2 number, since 2×165613330111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165613330151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82806665055 + 82806665056.

It is an arithmetic number, because the mean of its divisors is an integer number (82806665056).

Almost surely, 2^165613330111 is an apocalyptic number.

165613330111 is a deficient number, since it is larger than the sum of its proper divisors (1).

165613330111 is an equidigital number, since it uses as much as digits as its factorization.

165613330111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

Adding to 165613330111 its reverse (111033316561), we get a palindrome (276646646672).

The spelling of 165613330111 in words is "one hundred sixty-five billion, six hundred thirteen million, three hundred thirty thousand, one hundred eleven".