1668327377 has 2 divisors, whose sum is σ = 1668327378. Its totient is φ = 1668327376.

The previous prime is 1668327371. The next prime is 1668327383. The reversal of 1668327377 is 7737238661.

It is a balanced prime because it is at equal distance from previous prime (1668327371) and next prime (1668327383).

It can be written as a sum of positive squares in only one way, i.e., 876692881 + 791634496 = 29609^2 + 28136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1668327377 - 2⁴ = 1668327361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668327371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834163688 + 834163689.

It is an arithmetic number, because the mean of its divisors is an integer number (834163689).

Almost surely, 2^1668327377 is an apocalyptic number.

It is an amenable number.

1668327377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668327377 is an equidigital number, since it uses as much as digits as its factorization.

1668327377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 50.

The square root of 1668327377 is about 40845.1634468513. The cubic root of 1668327377 is about 1186.0247687365.

The spelling of 1668327377 in words is "one billion, six hundred sixty-eight million, three hundred twenty-seven thousand, three hundred seventy-seven".