1668353499 has 24 divisors (see below), whose sum is σ = 2495338560. Its totient is φ = 1072850688.

The previous prime is 1668353471. The next prime is 1668353543. The reversal of 1668353499 is 9943538661.

1668353499 is a `hidden beast` number, since 16 + 6 + 8 + 3 + 534 + 99 = 666.

It is not a de Polignac number, because 1668353499 - 2⁷ = 1668353371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1668353419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 343939 + ... + 348755.

It is an arithmetic number, because the mean of its divisors is an integer number (103972440).

Almost surely, 2^1668353499 is an apocalyptic number.

1668353499 is a deficient number, since it is larger than the sum of its proper divisors (826985061).

1668353499 is a wasteful number, since it uses less digits than its factorization.

1668353499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6179 (or 6176 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 1668353499 is about 40845.4832141817. The cubic root of 1668353499 is about 1186.0309588040.

The spelling of 1668353499 in words is "one billion, six hundred sixty-eight million, three hundred fifty-three thousand, four hundred ninety-nine".