266949653 has 2 divisors, whose sum is σ = 266949654. Its totient is φ = 266949652.

The previous prime is 266949643. The next prime is 266949659. The reversal of 266949653 is 356949662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144913444 + 122036209 = 12038^2 + 11047^2 .

It is a cyclic number.

It is not a de Polignac number, because 266949653 - 2⁴ = 266949637 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266949659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133474826 + 133474827.

It is an arithmetic number, because the mean of its divisors is an integer number (133474827).

Almost surely, 2^266949653 is an apocalyptic number.

It is an amenable number.

266949653 is a deficient number, since it is larger than the sum of its proper divisors (1).

266949653 is an equidigital number, since it uses as much as digits as its factorization.

266949653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 50.

The square root of 266949653 is about 16338.5939725547. The cubic root of 266949653 is about 643.8871928294.

Subtracting 266949653 from its reverse (356949662), we obtain a palindrome (90000009).

The spelling of 266949653 in words is "two hundred sixty-six million, nine hundred forty-nine thousand, six hundred fifty-three".