1668419799 has 32 divisors (see below), whose sum is σ = 2318595840. Its totient is φ = 1066291200.

The previous prime is 1668419761. The next prime is 1668419803. The reversal of 1668419799 is 9979148661.

It is a happy number.

It is not a de Polignac number, because 1668419799 - 2¹³ = 1668411607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668419719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2602519 + ... + 2603159.

It is an arithmetic number, because the mean of its divisors is an integer number (72456120).

Almost surely, 2^1668419799 is an apocalyptic number.

1668419799 is a deficient number, since it is larger than the sum of its proper divisors (650176041).

1668419799 is a wasteful number, since it uses less digits than its factorization.

1668419799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991.

The product of its digits is 5878656, while the sum is 60.

The square root of 1668419799 is about 40846.2948013648. The cubic root of 1668419799 is about 1186.0466694655.

The spelling of 1668419799 in words is "one billion, six hundred sixty-eight million, four hundred nineteen thousand, seven hundred ninety-nine".