26640666052274 has 8 divisors (see below), whose sum is σ = 40714980193260. Its totient is φ = 13069005987856.

The previous prime is 26640666052267. The next prime is 26640666052289. The reversal of 26640666052274 is 47225066604662.

It can be written as a sum of positive squares in 2 ways, for example, as 22627555326649 + 4013110725625 = 4756843^2 + 2003275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125663519009 + ... + 125663519220.

Almost surely, 2^{26640666052274} is an apocalyptic number.

26640666052274 is a deficient number, since it is larger than the sum of its proper divisors (14074314140986).

26640666052274 is a wasteful number, since it uses less digits than its factorization.

26640666052274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251327038284.

The product of its (nonzero) digits is 34836480, while the sum is 56.

The spelling of 26640666052274 in words is "twenty-six trillion, six hundred forty billion, six hundred sixty-six million, fifty-two thousand, two hundred seventy-four".