266666087 has 4 divisors (see below), whose sum is σ = 266785680. Its totient is φ = 266546496.

The previous prime is 266666077. The next prime is 266666093. The reversal of 266666087 is 780666662.

266666087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266666087 is a prime.

It is a super-2 number, since 2×266666087² = 142221603911783138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266666077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56387 + ... + 60932.

It is an arithmetic number, because the mean of its divisors is an integer number (66696420).

Almost surely, 2^266666087 is an apocalyptic number.

266666087 is a deficient number, since it is larger than the sum of its proper divisors (119593).

266666087 is a wasteful number, since it uses less digits than its factorization.

266666087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119592.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 266666087 is about 16329.9138699504. The cubic root of 266666087 is about 643.6591233517.

The spelling of 266666087 in words is "two hundred sixty-six million, six hundred sixty-six thousand, eighty-seven".