1668838555 has 8 divisors (see below), whose sum is σ = 2025108000. Its totient is φ = 1320069696.

The previous prime is 1668838543. The next prime is 1668838583. The reversal of 1668838555 is 5558388661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1668838555 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1668838496 and 1668838505.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1874655 + ... + 1875544.

It is an arithmetic number, because the mean of its divisors is an integer number (253138500).

Almost surely, 2^1668838555 is an apocalyptic number.

1668838555 is a deficient number, since it is larger than the sum of its proper divisors (356269445).

1668838555 is an equidigital number, since it uses as much as digits as its factorization.

1668838555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750293.

The product of its digits is 6912000, while the sum is 55.

The square root of 1668838555 is about 40851.4204771389. The cubic root of 1668838555 is about 1186.1458896203.

The spelling of 1668838555 in words is "one billion, six hundred sixty-eight million, eight hundred thirty-eight thousand, five hundred fifty-five".