266192887 has 2 divisors, whose sum is σ = 266192888. Its totient is φ = 266192886.

The previous prime is 266192803. The next prime is 266192893. The reversal of 266192887 is 788291662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266192887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266192887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266192287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133096443 + 133096444.

It is an arithmetic number, because the mean of its divisors is an integer number (133096444).

Almost surely, 2^266192887 is an apocalyptic number.

266192887 is a deficient number, since it is larger than the sum of its proper divisors (1).

266192887 is an equidigital number, since it uses as much as digits as its factorization.

266192887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 266192887 is about 16315.4186890806. The cubic root of 266192887 is about 643.2781727310.

The spelling of 266192887 in words is "two hundred sixty-six million, one hundred ninety-two thousand, eight hundred eighty-seven".