27211101221666 has 16 divisors (see below), whose sum is σ = 41191389353400. Its totient is φ = 13480639757568.

The previous prime is 27211101221651. The next prime is 27211101221701. The reversal of 27211101221666 is 66612210111272.

It can be written as a sum of positive squares in 4 ways, for example, as 24962663950225 + 2248437271441 = 4996265^2 + 1499479^2 .

It is a super-4 number, since 4×27211101221666⁴ (a number of 55 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43017656 + ... + 43645628.

Almost surely, 2^{27211101221666} is an apocalyptic number.

27211101221666 is a deficient number, since it is larger than the sum of its proper divisors (13980288131734).

27211101221666 is a wasteful number, since it uses less digits than its factorization.

27211101221666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826853.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 27211101221666 in words is "twenty-seven trillion, two hundred eleven billion, one hundred one million, two hundred twenty-one thousand, six hundred sixty-six".