266033561 has 16 divisors (see below), whose sum is σ = 289238400. Its totient is φ = 243710208.

The previous prime is 266033533. The next prime is 266033563. The reversal of 266033561 is 165330662.

It is a cyclic number.

It is not a de Polignac number, because 266033561 - 2¹⁰ = 266032537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266033563) 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, 320495 + ... + 321323.

It is an arithmetic number, because the mean of its divisors is an integer number (18077400).

Almost surely, 2^266033561 is an apocalyptic number.

It is an amenable number.

266033561 is a deficient number, since it is larger than the sum of its proper divisors (23204839).

266033561 is a wasteful number, since it uses less digits than its factorization.

266033561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 266033561 is about 16310.5352763176. The cubic root of 266033561 is about 643.1498054227.

The spelling of 266033561 in words is "two hundred sixty-six million, thirty-three thousand, five hundred sixty-one".