266663871 has 12 divisors (see below), whose sum is σ = 385440120. Its totient is φ = 177656400.

The previous prime is 266663869. The next prime is 266663897. The reversal of 266663871 is 178366662.

It is not a de Polignac number, because 266663871 - 2¹ = 266663869 is a prime.

It is a super-2 number, since 2×266663871² = 142219240193409282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266663171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5421 + ... + 23721.

It is an arithmetic number, because the mean of its divisors is an integer number (32120010).

Almost surely, 2^266663871 is an apocalyptic number.

266663871 is a deficient number, since it is larger than the sum of its proper divisors (118776249).

266663871 is a wasteful number, since it uses less digits than its factorization.

266663871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19926 (or 19923 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 266663871 is about 16329.8460188699. The cubic root of 266663871 is about 643.6573404072.

The spelling of 266663871 in words is "two hundred sixty-six million, six hundred sixty-three thousand, eight hundred seventy-one".