266990087 has 12 divisors (see below), whose sum is σ = 330410160. Its totient is φ = 211243968.

The previous prime is 266990077. The next prime is 266990089. The reversal of 266990087 is 780099662.

It is not a de Polignac number, because 266990087 - 2¹⁶ = 266924551 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266990089) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 111662 + ... + 114027.

It is an arithmetic number, because the mean of its divisors is an integer number (27534180).

Almost surely, 2^266990087 is an apocalyptic number.

266990087 is a deficient number, since it is larger than the sum of its proper divisors (63420073).

266990087 is a wasteful number, since it uses less digits than its factorization.

266990087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225722 (or 225709 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 266990087 is about 16339.8313026787. The cubic root of 266990087 is about 643.9197003579.

The spelling of 266990087 in words is "two hundred sixty-six million, nine hundred ninety thousand, eighty-seven".