266484991 has 2 divisors, whose sum is σ = 266484992. Its totient is φ = 266484990.

The previous prime is 266484949. The next prime is 266485097. The reversal of 266484991 is 199484662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266484991 - 2⁹ = 266484479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266484191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133242495 + 133242496.

It is an arithmetic number, because the mean of its divisors is an integer number (133242496).

Almost surely, 2^266484991 is an apocalyptic number.

266484991 is a deficient number, since it is larger than the sum of its proper divisors (1).

266484991 is an equidigital number, since it uses as much as digits as its factorization.

266484991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 49.

The square root of 266484991 is about 16324.3680122693. The cubic root of 266484991 is about 643.5133849234.

The spelling of 266484991 in words is "two hundred sixty-six million, four hundred eighty-four thousand, nine hundred ninety-one".