1668835799 has 4 divisors (see below), whose sum is σ = 1693743864. Its totient is φ = 1643927736.

The previous prime is 1668835793. The next prime is 1668835801. The reversal of 1668835799 is 9975388661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1668835799 - 2⁴ = 1668835783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668835793) 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, 12453932 + ... + 12454065.

It is an arithmetic number, because the mean of its divisors is an integer number (423435966).

Almost surely, 2^1668835799 is an apocalyptic number.

1668835799 is a deficient number, since it is larger than the sum of its proper divisors (24908065).

1668835799 is an equidigital number, since it uses as much as digits as its factorization.

1668835799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24908064.

The product of its digits is 19595520, while the sum is 62.

The square root of 1668835799 is about 40851.3867451278. The cubic root of 1668835799 is about 1186.1452366672.

The spelling of 1668835799 in words is "one billion, six hundred sixty-eight million, eight hundred thirty-five thousand, seven hundred ninety-nine".