266666473727 has 4 divisors (see below), whose sum is σ = 267629168856. Its totient is φ = 265703778600.

The previous prime is 266666473721. The next prime is 266666473739. The reversal of 266666473727 is 727374666662.

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

It is a cyclic number.

It is not a de Polignac number, because 266666473727 - 2⁶ = 266666473663 is a prime.

It is a super-2 number, since 2×266666473727² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266666473727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266666473721) 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, 481347149 + ... + 481347702.

It is an arithmetic number, because the mean of its divisors is an integer number (66907292214).

Almost surely, 2^266666473727 is an apocalyptic number.

266666473727 is a deficient number, since it is larger than the sum of its proper divisors (962695129).

266666473727 is an equidigital number, since it uses as much as digits as its factorization.

266666473727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962695128.

The product of its digits is 128024064, while the sum is 62.

The spelling of 266666473727 in words is "two hundred sixty-six billion, six hundred sixty-six million, four hundred seventy-three thousand, seven hundred twenty-seven".