2566398803 has 2 divisors, whose sum is σ = 2566398804. Its totient is φ = 2566398802.

The previous prime is 2566398733. The next prime is 2566398833. The reversal of 2566398803 is 3088936652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2566398803 - 2⁸ = 2566398547 is a prime.

It is not a weakly prime, because it can be changed into another prime (2566398833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283199401 + 1283199402.

It is an arithmetic number, because the mean of its divisors is an integer number (1283199402).

Almost surely, 2^2566398803 is an apocalyptic number.

2566398803 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566398803 is an equidigital number, since it uses as much as digits as its factorization.

2566398803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The square root of 2566398803 is about 50659.6368226224. The cubic root of 2566398803 is about 1369.1195797784.

The spelling of 2566398803 in words is "two billion, five hundred sixty-six million, three hundred ninety-eight thousand, eight hundred three".