668095541 has 2 divisors, whose sum is σ = 668095542. Its totient is φ = 668095540.

The previous prime is 668095531. The next prime is 668095543. The reversal of 668095541 is 145590866.

668095541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 489338641 + 178756900 = 22121^2 + 13370^2 .

It is a cyclic number.

It is not a de Polignac number, because 668095541 - 2¹⁴ = 668079157 is a prime.

It is a Sophie Germain prime.

Together with 668095543, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 668095492 and 668095501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668095543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334047770 + 334047771.

It is an arithmetic number, because the mean of its divisors is an integer number (334047771).

Almost surely, 2^668095541 is an apocalyptic number.

It is an amenable number.

668095541 is a deficient number, since it is larger than the sum of its proper divisors (1).

668095541 is an equidigital number, since it uses as much as digits as its factorization.

668095541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 668095541 is about 25847.5441966930. The cubic root of 668095541 is about 874.2041377252.

The spelling of 668095541 in words is "six hundred sixty-eight million, ninety-five thousand, five hundred forty-one".