266660427 has 16 divisors (see below), whose sum is σ = 388206720. Its totient is φ = 161472000.

The previous prime is 266660411. The next prime is 266660431. The reversal of 266660427 is 724066662.

It is not a de Polignac number, because 266660427 - 2⁴ = 266660411 is a prime.

It is a super-2 number, since 2×266660427² = 142215566655644658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266660447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45099 + ... + 50667.

It is an arithmetic number, because the mean of its divisors is an integer number (24262920).

Almost surely, 2^266660427 is an apocalyptic number.

266660427 is a deficient number, since it is larger than the sum of its proper divisors (121546293).

266660427 is a wasteful number, since it uses less digits than its factorization.

266660427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 266660427 is about 16329.7405674432. The cubic root of 266660427 is about 643.6545694213.

The spelling of 266660427 in words is "two hundred sixty-six million, six hundred sixty thousand, four hundred twenty-seven".