1668469798 has 4 divisors (see below), whose sum is σ = 2502704700. Its totient is φ = 834234898.

The previous prime is 1668469771. The next prime is 1668469801. The reversal of 1668469798 is 8979648661.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417117448 + ... + 417117451.

It is an arithmetic number, because the mean of its divisors is an integer number (625676175).

Almost surely, 2^1668469798 is an apocalyptic number.

1668469798 is a deficient number, since it is larger than the sum of its proper divisors (834234902).

1668469798 is an equidigital number, since it uses as much as digits as its factorization.

1668469798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834234901.

The product of its digits is 31352832, while the sum is 64.

The square root of 1668469798 is about 40846.9068351571. The cubic root of 1668469798 is about 1186.0585171142.

The spelling of 1668469798 in words is "one billion, six hundred sixty-eight million, four hundred sixty-nine thousand, seven hundred ninety-eight".