266621025 has 48 divisors (see below), whose sum is σ = 484754688. Its totient is φ = 128232000.

The previous prime is 266621023. The next prime is 266621063. The reversal of 266621025 is 520126662.

It is not a de Polignac number, because 266621025 - 2¹ = 266621023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 266620983 and 266621001.

It is not an unprimeable number, because it can be changed into a prime (266621021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106842 + ... + 109308.

It is an arithmetic number, because the mean of its divisors is an integer number (10099056).

Almost surely, 2^266621025 is an apocalyptic number.

266621025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266621025 is a deficient number, since it is larger than the sum of its proper divisors (218133663).

266621025 is a wasteful number, since it uses less digits than its factorization.

266621025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622 (or 2617 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 266621025 is about 16328.5340738230. The cubic root of 266621025 is about 643.6228655213.

Adding to 266621025 its reverse (520126662), we get a palindrome (786747687).

The spelling of 266621025 in words is "two hundred sixty-six million, six hundred twenty-one thousand, twenty-five".