266255870 has 16 divisors (see below), whose sum is σ = 507452688. Its totient is φ = 100237440.

The previous prime is 266255863. The next prime is 266255879. The reversal of 266255870 is 78552662.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266255879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782936 + ... + 783275.

It is an arithmetic number, because the mean of its divisors is an integer number (31715793).

Almost surely, 2^266255870 is an apocalyptic number.

266255870 is a deficient number, since it is larger than the sum of its proper divisors (241196818).

266255870 is a wasteful number, since it uses less digits than its factorization.

266255870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566235.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 266255870 is about 16317.3487429791. The cubic root of 266255870 is about 643.3289033554.

The spelling of 266255870 in words is "two hundred sixty-six million, two hundred fifty-five thousand, eight hundred seventy".