1266541333 has 2 divisors, whose sum is σ = 1266541334. Its totient is φ = 1266541332.

The previous prime is 1266541321. The next prime is 1266541337. The reversal of 1266541333 is 3331456621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1192873444 + 73667889 = 34538^2 + 8583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266541333 - 2¹⁷ = 1266410261 is a prime.

It is the 35589-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266541337) by changing a digit.

It is a nontrivial repunit in base 35588.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633270666 + 633270667.

It is an arithmetic number, because the mean of its divisors is an integer number (633270667).

Almost surely, 2^1266541333 is an apocalyptic number.

It is an amenable number.

1266541333 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266541333 is an equidigital number, since it uses as much as digits as its factorization.

1266541333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 34.

The square root of 1266541333 is about 35588.5000105371. The cubic root of 1266541333 is about 1081.9481677661.

Adding to 1266541333 its reverse (3331456621), we get a palindrome (4597997954).

The spelling of 1266541333 in words is "one billion, two hundred sixty-six million, five hundred forty-one thousand, three hundred thirty-three".