26066626165 has 4 divisors (see below), whose sum is σ = 31279951404. Its totient is φ = 20853300928.

The previous prime is 26066626163. The next prime is 26066626169. The reversal of 26066626165 is 56162666062.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16669650321 + 9396975844 = 129111^2 + 96938^2 .

It is a cyclic number.

It is not a de Polignac number, because 26066626165 - 2¹ = 26066626163 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 (26066626163) 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, 2606662612 + ... + 2606662621.

It is an arithmetic number, because the mean of its divisors is an integer number (7819987851).

Almost surely, 2^26066626165 is an apocalyptic number.

It is an amenable number.

26066626165 is a deficient number, since it is larger than the sum of its proper divisors (5213325239).

26066626165 is an equidigital number, since it uses as much as digits as its factorization.

26066626165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5213325238.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 26066626165 in words is "twenty-six billion, sixty-six million, six hundred twenty-six thousand, one hundred sixty-five".