1006165565 has 4 divisors (see below), whose sum is σ = 1207398684. Its totient is φ = 804932448.

The previous prime is 1006165529. The next prime is 1006165603. The reversal of 1006165565 is 5655616001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5655616001 = 7 ⋅807945143.

It can be written as a sum of positive squares in 2 ways, for example, as 159239161 + 846926404 = 12619^2 + 29102^2 .

It is a cyclic number.

It is not a de Polignac number, because 1006165565 - 2¹⁴ = 1006149181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100616552 + ... + 100616561.

It is an arithmetic number, because the mean of its divisors is an integer number (301849671).

Almost surely, 2^1006165565 is an apocalyptic number.

It is an amenable number.

1006165565 is a deficient number, since it is larger than the sum of its proper divisors (201233119).

1006165565 is an equidigital number, since it uses as much as digits as its factorization.

1006165565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201233118.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 1006165565 is about 31720.1129411608. The cubic root of 1006165565 is about 1002.0509789429.

The spelling of 1006165565 in words is "one billion, six million, one hundred sixty-five thousand, five hundred sixty-five".