26676631321 has 4 divisors (see below), whose sum is σ = 26690433892. Its totient is φ = 26662828752.

The previous prime is 26676631309. The next prime is 26676631343. The reversal of 26676631321 is 12313667662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12313667662 = 2 ⋅6156833831.

It can be written as a sum of positive squares in 2 ways, for example, as 7265175696 + 19411455625 = 85236^2 + 139325^2 .

It is a cyclic number.

It is not a de Polignac number, because 26676631321 - 2¹⁹ = 26676107033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26676631301) 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, 6898386 + ... + 6902251.

It is an arithmetic number, because the mean of its divisors is an integer number (6672608473).

Almost surely, 2^26676631321 is an apocalyptic number.

It is an amenable number.

26676631321 is a deficient number, since it is larger than the sum of its proper divisors (13802571).

26676631321 is a wasteful number, since it uses less digits than its factorization.

26676631321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13802570.

The product of its digits is 326592, while the sum is 43.

The spelling of 26676631321 in words is "twenty-six billion, six hundred seventy-six million, six hundred thirty-one thousand, three hundred twenty-one".