266563051 has 4 divisors (see below), whose sum is σ = 270541672. Its totient is φ = 262584432.

The previous prime is 266563019. The next prime is 266563061. The reversal of 266563051 is 150365662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 266563051 - 2⁵ = 266563019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266562998 and 266563016.

It is not an unprimeable number, because it can be changed into a prime (266563061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1989210 + ... + 1989343.

It is an arithmetic number, because the mean of its divisors is an integer number (67635418).

Almost surely, 2^266563051 is an apocalyptic number.

266563051 is a deficient number, since it is larger than the sum of its proper divisors (3978621).

266563051 is an equidigital number, since it uses as much as digits as its factorization.

266563051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978620.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 266563051 is about 16326.7587414036. The cubic root of 266563051 is about 643.5762124153.

The spelling of 266563051 in words is "two hundred sixty-six million, five hundred sixty-three thousand, fifty-one".