1665101117 has 2 divisors, whose sum is σ = 1665101118. Its totient is φ = 1665101116.

The previous prime is 1665101111. The next prime is 1665101173. The reversal of 1665101117 is 7111015661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1591930201 + 73170916 = 39899^2 + 8554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1665101117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1665101117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1665101111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832550558 + 832550559.

It is an arithmetic number, because the mean of its divisors is an integer number (832550559).

Almost surely, 2^1665101117 is an apocalyptic number.

It is an amenable number.

1665101117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665101117 is an equidigital number, since it uses as much as digits as its factorization.

1665101117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 29.

The square root of 1665101117 is about 40805.6505523439. The cubic root of 1665101117 is about 1185.2597523241.

Adding to 1665101117 its reverse (7111015661), we get a palindrome (8776116778).

The spelling of 1665101117 in words is "one billion, six hundred sixty-five million, one hundred one thousand, one hundred seventeen".