266686801 has 2 divisors, whose sum is σ = 266686802. Its totient is φ = 266686800.

The previous prime is 266686741. The next prime is 266686811. The reversal of 266686801 is 108686662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235315600 + 31371201 = 15340^2 + 5601^2 .

It is a cyclic number.

It is not a de Polignac number, because 266686801 - 2⁹ = 266686289 is a prime.

It is a super-2 number, since 2×266686801² = 142243699655227202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266686811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133343400 + 133343401.

It is an arithmetic number, because the mean of its divisors is an integer number (133343401).

Almost surely, 2^266686801 is an apocalyptic number.

It is an amenable number.

266686801 is a deficient number, since it is larger than the sum of its proper divisors (1).

266686801 is an equidigital number, since it uses as much as digits as its factorization.

266686801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 266686801 is about 16330.5480924554. The cubic root of 266686801 is about 643.6757889003.

The spelling of 266686801 in words is "two hundred sixty-six million, six hundred eighty-six thousand, eight hundred one".