3820805663 has 2 divisors, whose sum is σ = 3820805664. Its totient is φ = 3820805662.

The previous prime is 3820805623. The next prime is 3820805759. The reversal of 3820805663 is 3665080283.

It is a weak prime.

It is an emirp because it is prime and its reverse (3665080283) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3820805663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3820805663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3820805623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910402831 + 1910402832.

It is an arithmetic number, because the mean of its divisors is an integer number (1910402832).

Almost surely, 2^3820805663 is an apocalyptic number.

3820805663 is a deficient number, since it is larger than the sum of its proper divisors (1).

3820805663 is an equidigital number, since it uses as much as digits as its factorization.

3820805663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 3820805663 is about 61812.6658784427. The cubic root of 3820805663 is about 1563.3335550948. Note that the first 3 decimals are identical.

The spelling of 3820805663 in words is "three billion, eight hundred twenty million, eight hundred five thousand, six hundred sixty-three".