1668912250 has 16 divisors (see below), whose sum is σ = 3124204200. Its totient is φ = 667564800.

The previous prime is 1668912241. The next prime is 1668912263. The reversal of 1668912250 is 522198661.

It can be written as a sum of positive squares in 4 ways, for example, as 67551961 + 1601360289 = 8219^2 + 40017^2 .

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, 3337575 + ... + 3338074.

Almost surely, 2^1668912250 is an apocalyptic number.

1668912250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668912250 is a deficient number, since it is larger than the sum of its proper divisors (1455291950).

1668912250 is an equidigital number, since it uses as much as digits as its factorization.

1668912250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6675666 (or 6675656 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1668912250 is about 40852.3224554003. The cubic root of 1668912250 is about 1186.1633492151.

The spelling of 1668912250 in words is "one billion, six hundred sixty-eight million, nine hundred twelve thousand, two hundred fifty".