1000066505 has 4 divisors (see below), whose sum is σ = 1200079812. Its totient is φ = 800053200.

The previous prime is 1000066499. The next prime is 1000066511. The reversal of 1000066505 is 5056600001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5056600001 = 1601 ⋅3158401.

It is an interprime number because it is at equal distance from previous prime (1000066499) and next prime (1000066511).

It can be written as a sum of positive squares in 2 ways, for example, as 140873161 + 859193344 = 11869^2 + 29312^2 .

It is not a de Polignac number, because 1000066505 - 2⁴ = 1000066489 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, 100006646 + ... + 100006655.

It is an arithmetic number, because the mean of its divisors is an integer number (300019953).

Almost surely, 2^1000066505 is an apocalyptic number.

It is an amenable number.

1000066505 is a deficient number, since it is larger than the sum of its proper divisors (200013307).

1000066505 is an equidigital number, since it uses as much as digits as its factorization.

1000066505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200013306.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1000066505 is about 31623.8281205802. The cubic root of 1000066505 is about 1000.0221678419.

Adding to 1000066505 its reverse (5056600001), we get a palindrome (6056666506).

The spelling of 1000066505 in words is "one billion, sixty-six thousand, five hundred five".