266505625 has 15 divisors (see below), whose sum is σ = 333536203. Its totient is φ = 212878000.

The previous prime is 266505611. The next prime is 266505653. The reversal of 266505625 is 526505662.

The square root of 266505625 is 16325.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 253860489 + 12645136 = 15933^2 + 3556^2 .

It is not a de Polignac number, because 266505625 - 2¹³ = 266497433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 407799 + ... + 408451.

Almost surely, 2^266505625 is an apocalyptic number.

266505625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

266505625 is the 16325-th square number.

266505625 is the 8163-rd centered octagonal number.

It is an amenable number.

266505625 is a deficient number, since it is larger than the sum of its proper divisors (67030578).

266505625 is an frugal number, since it uses more digits than its factorization.

266505625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The cubic root of 266505625 is about 643.5299936292.

Adding to 266505625 its sum of digits (37), we get a palindrome (266505662).

The spelling of 266505625 in words is "two hundred sixty-six million, five hundred five thousand, six hundred twenty-five".