266642953 has 2 divisors, whose sum is σ = 266642954. Its totient is φ = 266642952.

The previous prime is 266642927. The next prime is 266642983. The reversal of 266642953 is 359246662.

266642953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251920384 + 14722569 = 15872^2 + 3837^2 .

It is a cyclic number.

It is not a de Polignac number, because 266642953 - 2¹⁷ = 266511881 is a prime.

It is not a weakly prime, because it can be changed into another prime (266642923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133321476 + 133321477.

It is an arithmetic number, because the mean of its divisors is an integer number (133321477).

Almost surely, 2^266642953 is an apocalyptic number.

It is an amenable number.

266642953 is a deficient number, since it is larger than the sum of its proper divisors (1).

266642953 is an equidigital number, since it uses as much as digits as its factorization.

266642953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 43.

The square root of 266642953 is about 16329.2055226211. The cubic root of 266642953 is about 643.6405097603.

The spelling of 266642953 in words is "two hundred sixty-six million, six hundred forty-two thousand, nine hundred fifty-three".