26866460621221 has 8 divisors (see below), whose sum is σ = 29214015434240. Its totient is φ = 24559034950512.

The previous prime is 26866460621219. The next prime is 26866460621233. The reversal of 26866460621221 is 12212606466862.

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

It is a cyclic number.

It is not a de Polignac number, because 26866460621221 - 2¹ = 26866460621219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26866460621201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10032284181 + ... + 10032286858.

It is an arithmetic number, because the mean of its divisors is an integer number (3651751929280).

Almost surely, 2^{26866460621221} is an apocalyptic number.

It is an amenable number.

26866460621221 is a deficient number, since it is larger than the sum of its proper divisors (2347554813019).

26866460621221 is a wasteful number, since it uses less digits than its factorization.

26866460621221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20064571155.

The product of its (nonzero) digits is 3981312, while the sum is 52.

The spelling of 26866460621221 in words is "twenty-six trillion, eight hundred sixty-six billion, four hundred sixty million, six hundred twenty-one thousand, two hundred twenty-one".