1668795827 has 2 divisors, whose sum is σ = 1668795828. Its totient is φ = 1668795826.

The previous prime is 1668795781. The next prime is 1668795829. The reversal of 1668795827 is 7285978661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1668795827 - 2¹² = 1668791731 is a prime.

It is a super-2 number, since 2×1668795827² = 5569759024425227858, which contains 22 as substring.

Together with 1668795829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1668795829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834397913 + 834397914.

It is an arithmetic number, because the mean of its divisors is an integer number (834397914).

Almost surely, 2^1668795827 is an apocalyptic number.

1668795827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668795827 is an equidigital number, since it uses as much as digits as its factorization.

1668795827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10160640, while the sum is 59.

The square root of 1668795827 is about 40850.8975054404. The cubic root of 1668795827 is about 1186.1357663974.

The spelling of 1668795827 in words is "one billion, six hundred sixty-eight million, seven hundred ninety-five thousand, eight hundred twenty-seven".