266451602481 has 12 divisors (see below), whose sum is σ = 387000917940. Its totient is φ = 176652995040.

The previous prime is 266451602453. The next prime is 266451602503. The reversal of 266451602481 is 184206154662.

It is a happy number.

266451602481 is a `hidden beast` number, since 2 + 6 + 6 + 4 + 5 + 160 + 2 + 481 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 128576030625 + 137875571856 = 358575^2 + 371316^2 .

It is not a de Polignac number, because 266451602481 - 2²⁵ = 266418048049 is a prime.

It is a super-2 number, since 2×266451602481² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266451602401) 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, 81782166 + ... + 81785423.

It is an arithmetic number, because the mean of its divisors is an integer number (32250076495).

Almost surely, 2^266451602481 is an apocalyptic number.

It is an amenable number.

266451602481 is a deficient number, since it is larger than the sum of its proper divisors (120549315459).

266451602481 is a wasteful number, since it uses less digits than its factorization.

266451602481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163567776 (or 163567773 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 266451602481 in words is "two hundred sixty-six billion, four hundred fifty-one million, six hundred two thousand, four hundred eighty-one".