266542871 has 4 divisors (see below), whose sum is σ = 304620432. Its totient is φ = 228465312.

The previous prime is 266542819. The next prime is 266542877. The reversal of 266542871 is 178245662.

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-266542871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266542877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19038770 + ... + 19038783.

It is an arithmetic number, because the mean of its divisors is an integer number (76155108).

Almost surely, 2^266542871 is an apocalyptic number.

266542871 is a deficient number, since it is larger than the sum of its proper divisors (38077561).

266542871 is an equidigital number, since it uses as much as digits as its factorization.

266542871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38077560.

The product of its digits is 161280, while the sum is 41.

The square root of 266542871 is about 16326.1407258421. The cubic root of 266542871 is about 643.5599714851.

The spelling of 266542871 in words is "two hundred sixty-six million, five hundred forty-two thousand, eight hundred seventy-one".