266861125 has 16 divisors (see below), whose sum is σ = 334764144. Its totient is φ = 212385600.

The previous prime is 266861123. The next prime is 266861141. The reversal of 266861125 is 521168662.

It can be written as a sum of positive squares in 8 ways, for example, as 47761921 + 219099204 = 6911^2 + 14802^2 .

It is not a de Polignac number, because 266861125 - 2¹ = 266861123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266861123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19207 + ... + 30043.

It is an arithmetic number, because the mean of its divisors is an integer number (20922759).

Almost surely, 2^266861125 is an apocalyptic number.

266861125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266861125 is a deficient number, since it is larger than the sum of its proper divisors (67903019).

266861125 is a wasteful number, since it uses less digits than its factorization.

266861125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11049 (or 11039 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 266861125 is about 16335.8845796608. The cubic root of 266861125 is about 643.8160079360.

The spelling of 266861125 in words is "two hundred sixty-six million, eight hundred sixty-one thousand, one hundred twenty-five".