1001668 has 12 divisors (see below), whose sum is σ = 1778112. Its totient is φ = 493640.

The previous prime is 1001659. The next prime is 1001669. The reversal of 1001668 is 8661001.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1001669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1480 + ... + 2047.

It is an arithmetic number, because the mean of its divisors is an integer number (148176).

2^1001668 is an apocalyptic number.

It is an amenable number.

1001668 is a deficient number, since it is larger than the sum of its proper divisors (776444).

1001668 is a wasteful number, since it uses less digits than its factorization.

1001668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3602 (or 3600 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1001668 is about 1000.8336525117. The cubic root of 1001668 is about 100.0555691150.

Adding to 1001668 its reverse (8661001), we get a palindrome (9662669).

The spelling of 1001668 in words is "one million, one thousand, six hundred sixty-eight".