1668364679 has 2 divisors, whose sum is σ = 1668364680. Its totient is φ = 1668364678.

The previous prime is 1668364637. The next prime is 1668364699. The reversal of 1668364679 is 9764638661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1668364679 - 2²⁰ = 1667316103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1668364699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834182339 + 834182340.

It is an arithmetic number, because the mean of its divisors is an integer number (834182340).

Almost surely, 2^1668364679 is an apocalyptic number.

1668364679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668364679 is an equidigital number, since it uses as much as digits as its factorization.

1668364679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 56.

The square root of 1668364679 is about 40845.6200711900. The cubic root of 1668364679 is about 1186.0336080820.

The spelling of 1668364679 in words is "one billion, six hundred sixty-eight million, three hundred sixty-four thousand, six hundred seventy-nine".