1665165153 has 16 divisors (see below), whose sum is σ = 2275644096. Its totient is φ = 1082484480.

The previous prime is 1665165143. The next prime is 1665165163. The reversal of 1665165153 is 3515615661.

It is an interprime number because it is at equal distance from previous prime (1665165143) and next prime (1665165163).

It is not a de Polignac number, because 1665165153 - 2⁵ = 1665165121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1665165143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69133 + ... + 90053.

It is an arithmetic number, because the mean of its divisors is an integer number (142227756).

Almost surely, 2^1665165153 is an apocalyptic number.

It is an amenable number.

1665165153 is a deficient number, since it is larger than the sum of its proper divisors (610478943).

1665165153 is a wasteful number, since it uses less digits than its factorization.

1665165153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21584.

The product of its digits is 81000, while the sum is 39.

The square root of 1665165153 is about 40806.4351910333. The cubic root of 1665165153 is about 1185.2749462604.

The spelling of 1665165153 in words is "one billion, six hundred sixty-five million, one hundred sixty-five thousand, one hundred fifty-three".