266525887 has 2 divisors, whose sum is σ = 266525888. Its totient is φ = 266525886.

The previous prime is 266525867. The next prime is 266525891. The reversal of 266525887 is 788525662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266525887 - 2⁷ = 266525759 is a prime.

It is a super-2 number, since 2×266525887² = 142072096882273538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266525887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266525867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133262943 + 133262944.

It is an arithmetic number, because the mean of its divisors is an integer number (133262944).

Almost surely, 2^266525887 is an apocalyptic number.

266525887 is a deficient number, since it is larger than the sum of its proper divisors (1).

266525887 is an equidigital number, since it uses as much as digits as its factorization.

266525887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 49.

The square root of 266525887 is about 16325.6205701345. The cubic root of 266525887 is about 643.5463020709.

The spelling of 266525887 in words is "two hundred sixty-six million, five hundred twenty-five thousand, eight hundred eighty-seven".