1668384454 has 16 divisors (see below), whose sum is σ = 2890677456. Its totient is φ = 713747200.

The previous prime is 1668384451. The next prime is 1668384469. The reversal of 1668384454 is 4544838661.

It is a junction number, because it is equal to n+sod(n) for n = 1668384398 and 1668384407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668384451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2230087 + ... + 2230834.

It is an arithmetic number, because the mean of its divisors is an integer number (180667341).

Almost surely, 2^1668384454 is an apocalyptic number.

1668384454 is a deficient number, since it is larger than the sum of its proper divisors (1222293002).

1668384454 is a wasteful number, since it uses less digits than its factorization.

1668384454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4460951.

The product of its digits is 2211840, while the sum is 49.

The square root of 1668384454 is about 40845.8621404910. The cubic root of 1668384454 is about 1186.0382940523.

The spelling of 1668384454 in words is "one billion, six hundred sixty-eight million, three hundred eighty-four thousand, four hundred fifty-four".