266664953 has 2 divisors, whose sum is σ = 266664954. Its totient is φ = 266664952.

The previous prime is 266664911. The next prime is 266664991. The reversal of 266664953 is 359466662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252587449 + 14077504 = 15893^2 + 3752^2 .

It is a cyclic number.

It is not a de Polignac number, because 266664953 - 2²⁶ = 199556089 is a prime.

It is a super-2 number, since 2×266664953² = 142220394316984418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266664898 and 266664907.

It is not a weakly prime, because it can be changed into another prime (266664053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133332476 + 133332477.

It is an arithmetic number, because the mean of its divisors is an integer number (133332477).

Almost surely, 2^266664953 is an apocalyptic number.

It is an amenable number.

266664953 is a deficient number, since it is larger than the sum of its proper divisors (1).

266664953 is an equidigital number, since it uses as much as digits as its factorization.

266664953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 47.

The square root of 266664953 is about 16329.8791483587. The cubic root of 266664953 is about 643.6582109617.

The spelling of 266664953 in words is "two hundred sixty-six million, six hundred sixty-four thousand, nine hundred fifty-three".