1668036241 has 2 divisors, whose sum is σ = 1668036242. Its totient is φ = 1668036240.

The previous prime is 1668036211. The next prime is 1668036323. The reversal of 1668036241 is 1426308661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1659747600 + 8288641 = 40740^2 + 2879^2 .

It is a cyclic number.

It is not a de Polignac number, because 1668036241 - 2⁷ = 1668036113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1668036241.

It is not a weakly prime, because it can be changed into another prime (1668036211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834018120 + 834018121.

It is an arithmetic number, because the mean of its divisors is an integer number (834018121).

Almost surely, 2^1668036241 is an apocalyptic number.

It is an amenable number.

1668036241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668036241 is an equidigital number, since it uses as much as digits as its factorization.

1668036241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 1668036241 is about 40841.5993932657. The cubic root of 1668036241 is about 1185.9557745652.

The spelling of 1668036241 in words is "one billion, six hundred sixty-eight million, thirty-six thousand, two hundred forty-one".