1006500665 has 8 divisors (see below), whose sum is σ = 1212501960. Its totient is φ = 802066432.

The previous prime is 1006500643. The next prime is 1006500673. The reversal of 1006500665 is 5660056001.

It can be written as a sum of positive squares in 4 ways, for example, as 196756729 + 809743936 = 14027^2 + 28456^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1006500665 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390350 + ... + 392919.

It is an arithmetic number, because the mean of its divisors is an integer number (151562745).

Almost surely, 2^1006500665 is an apocalyptic number.

It is an amenable number.

1006500665 is a deficient number, since it is larger than the sum of its proper divisors (206001295).

1006500665 is an equidigital number, since it uses as much as digits as its factorization.

1006500665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783531.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1006500665 is about 31725.3946389954. The cubic root of 1006500665 is about 1002.1622098125.

Adding to 1006500665 its reverse (5660056001), we get a palindrome (6666556666).

The spelling of 1006500665 in words is "one billion, six million, five hundred thousand, six hundred sixty-five".