135671665 has 16 divisors (see below), whose sum is σ = 170666496. Its totient is φ = 103420800.

The previous prime is 135671659. The next prime is 135671671. The reversal of 135671665 is 566176531.

It is an interprime number because it is at equal distance from previous prime (135671659) and next prime (135671671).

It is not a de Polignac number, because 135671665 - 2¹⁷ = 135540593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 1120 + ... + 16510.

It is an arithmetic number, because the mean of its divisors is an integer number (10666656).

Almost surely, 2^135671665 is an apocalyptic number.

It is an amenable number.

135671665 is a deficient number, since it is larger than the sum of its proper divisors (34994831).

135671665 is a wasteful number, since it uses less digits than its factorization.

135671665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15480.

The product of its digits is 113400, while the sum is 40.

The square root of 135671665 is about 11647.8180360100. The cubic root of 135671665 is about 513.8421406556.

The spelling of 135671665 in words is "one hundred thirty-five million, six hundred seventy-one thousand, six hundred sixty-five".