266564541 has 4 divisors (see below), whose sum is σ = 355419392. Its totient is φ = 177709692.

The previous prime is 266564533. The next prime is 266564569. The reversal of 266564541 is 145465662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 266564541 - 2³ = 266564533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266564541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266564531) 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, 44427421 + ... + 44427426.

It is an arithmetic number, because the mean of its divisors is an integer number (88854848).

Almost surely, 2^266564541 is an apocalyptic number.

It is an amenable number.

266564541 is a deficient number, since it is larger than the sum of its proper divisors (88854851).

266564541 is an equidigital number, since it uses as much as digits as its factorization.

266564541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88854850.

The product of its digits is 172800, while the sum is 39.

The square root of 266564541 is about 16326.8043719523. The cubic root of 266564541 is about 643.5774115397.

The spelling of 266564541 in words is "two hundred sixty-six million, five hundred sixty-four thousand, five hundred forty-one".