1000326665 has 32 divisors (see below), whose sum is σ = 1387634976. Its totient is φ = 685670400.

The previous prime is 1000326647. The next prime is 1000326671. The reversal of 1000326665 is 5666230001.

It can be written as a sum of positive squares in 16 ways, for example, as 264615289 + 735711376 = 16267^2 + 27124^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1000326665 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 74465 + ... + 86865.

It is an arithmetic number, because the mean of its divisors is an integer number (43363593).

Almost surely, 2^1000326665 is an apocalyptic number.

It is an amenable number.

1000326665 is a deficient number, since it is larger than the sum of its proper divisors (387308311).

1000326665 is a wasteful number, since it uses less digits than its factorization.

1000326665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12509.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1000326665 is about 31627.9412071036. The cubic root of 1000326665 is about 1000.1088764788.

Adding to 1000326665 its reverse (5666230001), we get a palindrome (6666556666).

The spelling of 1000326665 in words is "one billion, three hundred twenty-six thousand, six hundred sixty-five".