1000668 has 12 divisors (see below), whose sum is σ = 2334920. Its totient is φ = 333552.

The previous prime is 1000667. The next prime is 1000669. The reversal of 1000668 is 8660001.

It is an interprime number because it is at equal distance from previous prime (1000667) and next prime (1000669).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41683 + ... + 41706.

2^1000668 is an apocalyptic number.

It is an amenable number.

1000668 is an abundant number, since it is smaller than the sum of its proper divisors (1334252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000668 is a wasteful number, since it uses less digits than its factorization.

1000668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83396 (or 83394 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1000668 is about 1000.3339442406. Note that the first 3 decimals coincide. The cubic root of 1000668 is about 100.0222617105.

Adding to 1000668 its reverse (8660001), we get a palindrome (9660669).

The spelling of 1000668 in words is "one million, six hundred sixty-eight", and thus it is an aban number.