266803065 has 40 divisors (see below), whose sum is σ = 480414528. Its totient is φ = 142242480.

The previous prime is 266803051. The next prime is 266803087. The reversal of 266803065 is 560308662.

It is not a de Polignac number, because 266803065 - 2⁷ = 266802937 is a prime.

It is an unprimeable number.

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 in 39 ways as a sum of consecutive naturals, for example, 97060 + ... + 99770.

Almost surely, 2^266803065 is an apocalyptic number.

It is an amenable number.

266803065 is a deficient number, since it is larger than the sum of its proper divisors (213611463).

266803065 is an frugal number, since it uses more digits than its factorization.

266803065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743 (or 2719 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 266803065 is about 16334.1074136299. The cubic root of 266803065 is about 643.7693136506.

The spelling of 266803065 in words is "two hundred sixty-six million, eight hundred three thousand, sixty-five".