266424661 has 4 divisors (see below), whose sum is σ = 267276172. Its totient is φ = 265573152.

The previous prime is 266424611. The next prime is 266424673. The reversal of 266424661 is 166424662.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33709636 + 232715025 = 5806^2 + 15255^2 .

It is a cyclic number.

It is not a de Polignac number, because 266424661 - 2¹⁵ = 266391893 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 266424661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266424611) 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, 425286 + ... + 425911.

It is an arithmetic number, because the mean of its divisors is an integer number (66819043).

Almost surely, 2^266424661 is an apocalyptic number.

It is an amenable number.

266424661 is a deficient number, since it is larger than the sum of its proper divisors (851511).

266424661 is an equidigital number, since it uses as much as digits as its factorization.

266424661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851510.

The product of its digits is 82944, while the sum is 37.

The square root of 266424661 is about 16322.5200566579. The cubic root of 266424661 is about 643.4648192206.

Subtracting from 266424661 its reverse (166424662), we obtain a palindrome (99999999).

The spelling of 266424661 in words is "two hundred sixty-six million, four hundred twenty-four thousand, six hundred sixty-one".