266540275 has 6 divisors (see below), whose sum is σ = 330509972. Its totient is φ = 213232200.

The previous prime is 266540269. The next prime is 266540299. The reversal of 266540275 is 572045662.

It is not a de Polignac number, because 266540275 - 2⁷ = 266540147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5330781 + ... + 5330830.

Almost surely, 2^266540275 is an apocalyptic number.

266540275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

266540275 is a deficient number, since it is larger than the sum of its proper divisors (63969697).

266540275 is a wasteful number, since it uses less digits than its factorization.

266540275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10661621 (or 10661616 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 266540275 is about 16326.0612212499. The cubic root of 266540275 is about 643.5578821563.

It can be divided in two parts, 266540 and 275, that added together give a triangular number (266815 = T₇₃₀).

The spelling of 266540275 in words is "two hundred sixty-six million, five hundred forty thousand, two hundred seventy-five".