266546543 has 2 divisors, whose sum is σ = 266546544. Its totient is φ = 266546542.

The previous prime is 266546537. The next prime is 266546549. The reversal of 266546543 is 345645662.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (266546537) and next prime (266546549).

It is a cyclic number.

It is not a de Polignac number, because 266546543 - 2¹⁸ = 266284399 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266546543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266546549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133273271 + 133273272.

It is an arithmetic number, because the mean of its divisors is an integer number (133273272).

Almost surely, 2^266546543 is an apocalyptic number.

266546543 is a deficient number, since it is larger than the sum of its proper divisors (1).

266546543 is an equidigital number, since it uses as much as digits as its factorization.

266546543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 41.

The square root of 266546543 is about 16326.2531831403. The cubic root of 266546543 is about 643.5629267837.

The spelling of 266546543 in words is "two hundred sixty-six million, five hundred forty-six thousand, five hundred forty-three".