1668086759 has 2 divisors, whose sum is σ = 1668086760. Its totient is φ = 1668086758.

The previous prime is 1668086723. The next prime is 1668086803. The reversal of 1668086759 is 9576808661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1668086759 is a prime.

It is a super-2 number, since 2×1668086759² = 5565026871102248162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1668083759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834043379 + 834043380.

It is an arithmetic number, because the mean of its divisors is an integer number (834043380).

Almost surely, 2^1668086759 is an apocalyptic number.

1668086759 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668086759 is an equidigital number, since it uses as much as digits as its factorization.

1668086759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The square root of 1668086759 is about 40842.2178511403. The cubic root of 1668086759 is about 1185.9677470287.

The spelling of 1668086759 in words is "one billion, six hundred sixty-eight million, eighty-six thousand, seven hundred fifty-nine".