266225605 has 4 divisors (see below), whose sum is σ = 319470732. Its totient is φ = 212980480.

The previous prime is 266225591. The next prime is 266225653. The reversal of 266225605 is 506522662.

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 202720644 + 63504961 = 14238^2 + 7969^2 .

It is not a de Polignac number, because 266225605 - 2¹⁷ = 266094533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26622556 + ... + 26622565.

It is an arithmetic number, because the mean of its divisors is an integer number (79867683).

Almost surely, 2^266225605 is an apocalyptic number.

It is an amenable number.

266225605 is a deficient number, since it is larger than the sum of its proper divisors (53245127).

266225605 is an equidigital number, since it uses as much as digits as its factorization.

266225605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53245126.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 266225605 is about 16316.4213294460. The cubic root of 266225605 is about 643.3045269451.

The spelling of 266225605 in words is "two hundred sixty-six million, two hundred twenty-five thousand, six hundred five".