1065518065 has 4 divisors (see below), whose sum is σ = 1278621684. Its totient is φ = 852414448.

The previous prime is 1065518063. The next prime is 1065518107. The reversal of 1065518065 is 5608155601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5608155601 = 37 ⋅151571773.

It can be written as a sum of positive squares in 2 ways, for example, as 679749184 + 385768881 = 26072^2 + 19641^2 .

It is a cyclic number.

It is not a de Polignac number, because 1065518065 - 2¹ = 1065518063 is a prime.

It is a super-2 number, since 2×1065518065² = 2270657493682688450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1065518063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106551802 + ... + 106551811.

It is an arithmetic number, because the mean of its divisors is an integer number (319655421).

Almost surely, 2^1065518065 is an apocalyptic number.

It is an amenable number.

1065518065 is a deficient number, since it is larger than the sum of its proper divisors (213103619).

1065518065 is an equidigital number, since it uses as much as digits as its factorization.

1065518065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213103618.

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 1065518065 is about 32642.2742007967. The cubic root of 1065518065 is about 1021.3790346864.

The spelling of 1065518065 in words is "one billion, sixty-five million, five hundred eighteen thousand, sixty-five".