1668343426 has 8 divisors (see below), whose sum is σ = 2521618704. Its totient is φ = 827803860.

The previous prime is 1668343403. The next prime is 1668343429. The reversal of 1668343426 is 6243438661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1668343429) 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, 3183600 + ... + 3184123.

It is an arithmetic number, because the mean of its divisors is an integer number (315202338).

Almost surely, 2^1668343426 is an apocalyptic number.

1668343426 is a deficient number, since it is larger than the sum of its proper divisors (853275278).

1668343426 is a wasteful number, since it uses less digits than its factorization.

1668343426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6367856.

The product of its digits is 497664, while the sum is 43.

The square root of 1668343426 is about 40845.3599078280. The cubic root of 1668343426 is about 1186.0285718371.

The spelling of 1668343426 in words is "one billion, six hundred sixty-eight million, three hundred forty-three thousand, four hundred twenty-six".