1668187441 has 16 divisors (see below), whose sum is σ = 1861704000. Its totient is φ = 1485485568.

The previous prime is 1668187399. The next prime is 1668187453. The reversal of 1668187441 is 1447818661.

It is not a de Polignac number, because 1668187441 - 2²¹ = 1666090289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1668187391 and 1668187400.

It is not an unprimeable number, because it can be changed into a prime (1668187471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282285 + ... + 288133.

It is an arithmetic number, because the mean of its divisors is an integer number (116356500).

Almost surely, 2^1668187441 is an apocalyptic number.

It is an amenable number.

1668187441 is a deficient number, since it is larger than the sum of its proper divisors (193516559).

1668187441 is a wasteful number, since it uses less digits than its factorization.

1668187441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768.

The product of its digits is 258048, while the sum is 46.

The square root of 1668187441 is about 40843.4504051751. The cubic root of 1668187441 is about 1185.9916073389.

The spelling of 1668187441 in words is "one billion, six hundred sixty-eight million, one hundred eighty-seven thousand, four hundred forty-one".