266663827 has 4 divisors (see below), whose sum is σ = 266818216. Its totient is φ = 266509440.

The previous prime is 266663783. The next prime is 266663843. The reversal of 266663827 is 728366662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266663827 is a prime.

It is a super-2 number, since 2×266663827² = 142219193260571858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266663867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74574 + ... + 78067.

It is an arithmetic number, because the mean of its divisors is an integer number (66704554).

Almost surely, 2^266663827 is an apocalyptic number.

266663827 is a deficient number, since it is larger than the sum of its proper divisors (154389).

266663827 is a wasteful number, since it uses less digits than its factorization.

266663827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154388.

The product of its digits is 870912, while the sum is 46.

The square root of 266663827 is about 16329.8446716434. The cubic root of 266663827 is about 643.6573050056.

The spelling of 266663827 in words is "two hundred sixty-six million, six hundred sixty-three thousand, eight hundred twenty-seven".