266051087 has 4 divisors (see below), whose sum is σ = 266326056. Its totient is φ = 265776120.

The previous prime is 266051059. The next prime is 266051099. The reversal of 266051087 is 780150662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 266051087 - 2¹⁰ = 266050063 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 (266051047) 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 3 ways as a sum of consecutive naturals, for example, 136028 + ... + 137969.

It is an arithmetic number, because the mean of its divisors is an integer number (66581514).

Almost surely, 2^266051087 is an apocalyptic number.

266051087 is a deficient number, since it is larger than the sum of its proper divisors (274969).

266051087 is an equidigital number, since it uses as much as digits as its factorization.

266051087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274968.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 266051087 is about 16311.0725275808. The cubic root of 266051087 is about 643.1639284478.

The spelling of 266051087 in words is "two hundred sixty-six million, fifty-one thousand, eighty-seven".