27266333921 has 2 divisors, whose sum is σ = 27266333922. Its totient is φ = 27266333920.

The previous prime is 27266333909. The next prime is 27266333959. The reversal of 27266333921 is 12933366272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15361123600 + 11905210321 = 123940^2 + 109111^2 .

It is a cyclic number.

It is not a de Polignac number, because 27266333921 - 2¹⁰ = 27266332897 is a prime.

It is not a weakly prime, because it can be changed into another prime (27263333921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13633166960 + 13633166961.

It is an arithmetic number, because the mean of its divisors is an integer number (13633166961).

Almost surely, 2^27266333921 is an apocalyptic number.

It is an amenable number.

27266333921 is a deficient number, since it is larger than the sum of its proper divisors (1).

27266333921 is an equidigital number, since it uses as much as digits as its factorization.

27266333921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 44.

The spelling of 27266333921 in words is "twenty-seven billion, two hundred sixty-six million, three hundred thirty-three thousand, nine hundred twenty-one".