1668795307 has 2 divisors, whose sum is σ = 1668795308. Its totient is φ = 1668795306.

The previous prime is 1668795287. The next prime is 1668795347. The reversal of 1668795307 is 7035978661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1668795307 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668795347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834397653 + 834397654.

It is an arithmetic number, because the mean of its divisors is an integer number (834397654).

Almost surely, 2^1668795307 is an apocalyptic number.

1668795307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668795307 is an equidigital number, since it uses as much as digits as its factorization.

1668795307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The square root of 1668795307 is about 40850.8911408307. The cubic root of 1668795307 is about 1186.1356431967.

The spelling of 1668795307 in words is "one billion, six hundred sixty-eight million, seven hundred ninety-five thousand, three hundred seven".