1668502097 has 2 divisors, whose sum is σ = 1668502098. Its totient is φ = 1668502096.

The previous prime is 1668502079. The next prime is 1668502109. The reversal of 1668502097 is 7902058661.

Together with previous prime (1668502079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1202633041 + 465869056 = 34679^2 + 21584^2 .

It is a cyclic number.

It is not a de Polignac number, because 1668502097 - 2¹⁰ = 1668501073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668502007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834251048 + 834251049.

It is an arithmetic number, because the mean of its divisors is an integer number (834251049).

Almost surely, 2^1668502097 is an apocalyptic number.

It is an amenable number.

1668502097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668502097 is an equidigital number, since it uses as much as digits as its factorization.

1668502097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 1668502097 is about 40847.3021997781. The cubic root of 1668502097 is about 1186.0661704856.

The spelling of 1668502097 in words is "one billion, six hundred sixty-eight million, five hundred two thousand, ninety-seven".