1065551663 has 4 divisors (see below), whose sum is σ = 1162420008. Its totient is φ = 968683320.

The previous prime is 1065551633. The next prime is 1065551671. The reversal of 1065551663 is 3661555601.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1065551663 - 2¹⁰ = 1065550639 is a prime.

It is a super-2 number, since 2×1065551663² = 2270800693044131138, 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 (1065551633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48434156 + ... + 48434177.

It is an arithmetic number, because the mean of its divisors is an integer number (290605002).

Almost surely, 2^1065551663 is an apocalyptic number.

1065551663 is a deficient number, since it is larger than the sum of its proper divisors (96868345).

1065551663 is an equidigital number, since it uses as much as digits as its factorization.

1065551663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96868344.

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 1065551663 is about 32642.7888361273. The cubic root of 1065551663 is about 1021.3897699751.

The spelling of 1065551663 in words is "one billion, sixty-five million, five hundred fifty-one thousand, six hundred sixty-three".