2605166475803 has 2 divisors, whose sum is σ = 2605166475804. Its totient is φ = 2605166475802.

The previous prime is 2605166475799. The next prime is 2605166475829. The reversal of 2605166475803 is 3085746615062.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2605166475803 - 2² = 2605166475799 is a prime.

It is not a weakly prime, because it can be changed into another prime (2605166475403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302583237901 + 1302583237902.

It is an arithmetic number, because the mean of its divisors is an integer number (1302583237902).

Almost surely, 2^{2605166475803} is an apocalyptic number.

2605166475803 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605166475803 is an equidigital number, since it uses as much as digits as its factorization.

2605166475803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 2605166475803 in words is "two trillion, six hundred five billion, one hundred sixty-six million, four hundred seventy-five thousand, eight hundred three".