266803243 has 16 divisors (see below), whose sum is σ = 319435776. Its totient is φ = 217879200.

The previous prime is 266803241. The next prime is 266803249. The reversal of 266803243 is 342308662.

It is not a de Polignac number, because 266803243 - 2¹ = 266803241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 266803199 and 266803208.

It is not an unprimeable number, because it can be changed into a prime (266803241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39193 + ... + 45493.

It is an arithmetic number, because the mean of its divisors is an integer number (19964736).

Almost surely, 2^266803243 is an apocalyptic number.

266803243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

266803243 is a deficient number, since it is larger than the sum of its proper divisors (52632533).

266803243 is a wasteful number, since it uses less digits than its factorization.

266803243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6594.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 266803243 is about 16334.1128623504. The cubic root of 266803243 is about 643.7694568160.

The spelling of 266803243 in words is "two hundred sixty-six million, eight hundred three thousand, two hundred forty-three".