1065565663 has 4 divisors (see below), whose sum is σ = 1065645288. Its totient is φ = 1065486040.

The previous prime is 1065565637. The next prime is 1065565673. The reversal of 1065565663 is 3665655601.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3665655601 = 37 ⋅99071773.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1065565663 is a prime.

It is a super-2 number, since 2×1065565663² = 2270860364329259138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065565673) 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, 14281 + ... + 48322.

It is an arithmetic number, because the mean of its divisors is an integer number (266411322).

Almost surely, 2^1065565663 is an apocalyptic number.

1065565663 is a deficient number, since it is larger than the sum of its proper divisors (79625).

1065565663 is an equidigital number, since it uses as much as digits as its factorization.

1065565663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79624.

The product of its (nonzero) digits is 486000, while the sum is 43.

The square root of 1065565663 is about 32643.0032778848. The cubic root of 1065565663 is about 1021.3942432117.

The spelling of 1065565663 in words is "one billion, sixty-five million, five hundred sixty-five thousand, six hundred sixty-three".