1006605505 has 4 divisors (see below), whose sum is σ = 1207926612. Its totient is φ = 805284400.

The previous prime is 1006605499. The next prime is 1006605559. The reversal of 1006605505 is 5055066001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5055066001 = 1663 ⋅3039727.

It can be written as a sum of positive squares in 2 ways, for example, as 391367089 + 615238416 = 19783^2 + 24804^2 .

It is not a de Polignac number, because 1006605505 - 2²⁷ = 872387777 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100660546 + ... + 100660555.

It is an arithmetic number, because the mean of its divisors is an integer number (301981653).

Almost surely, 2^1006605505 is an apocalyptic number.

It is an amenable number.

1006605505 is a deficient number, since it is larger than the sum of its proper divisors (201321107).

1006605505 is an equidigital number, since it uses as much as digits as its factorization.

1006605505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201321106.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1006605505 is about 31727.0469000820. The cubic root of 1006605505 is about 1002.1970046358.

The spelling of 1006605505 in words is "one billion, six million, six hundred five thousand, five hundred five".