26866160281 has 3 divisors (see below), whose sum is σ = 26866324191. Its totient is φ = 26865996372.

The previous prime is 26866160197. The next prime is 26866160311. The reversal of 26866160281 is 18206166862.

The square root of 26866160281 is 163909.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 14849615881 + 12016544400 = 121859^2 + 109620^2 .

It is not a de Polignac number, because 26866160281 - 2¹⁵ = 26866127513 is a prime.

It is a super-4 number, since 4×26866160281⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26866160081) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 81955 + ... + 245863.

It is an arithmetic number, because the mean of its divisors is an integer number (8955441397).

Almost surely, 2^26866160281 is an apocalyptic number.

26866160281 is the 163909-th square number.

26866160281 is the 81955-th centered octagonal number.

It is an amenable number.

26866160281 is a deficient number, since it is larger than the sum of its proper divisors (163910).

26866160281 is an frugal number, since it uses more digits than its factorization.

26866160281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327818 (or 163909 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 26866160281 in words is "twenty-six billion, eight hundred sixty-six million, one hundred sixty thousand, two hundred eighty-one".