1668790255 has 12 divisors (see below), whose sum is σ = 2201148936. Its totient is φ = 1213665200.

The previous prime is 1668790229. The next prime is 1668790271. The reversal of 1668790255 is 5520978661.

It is not a de Polignac number, because 1668790255 - 2⁵ = 1668790223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1668790199 and 1668790208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1378561 + ... + 1379770.

It is an arithmetic number, because the mean of its divisors is an integer number (183429078).

Almost surely, 2^1668790255 is an apocalyptic number.

1668790255 is a deficient number, since it is larger than the sum of its proper divisors (532358681).

1668790255 is a wasteful number, since it uses less digits than its factorization.

1668790255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758358 (or 2758347 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 1668790255 is about 40850.8293061475. The cubic root of 1668790255 is about 1186.1344462527.

The spelling of 1668790255 in words is "one billion, six hundred sixty-eight million, seven hundred ninety thousand, two hundred fifty-five".