27126661 has 16 divisors (see below), whose sum is σ = 29986560. Its totient is φ = 24442560.

The previous prime is 27126647. The next prime is 27126677. The reversal of 27126661 is 16662172.

27126661 = T₂₉₀ + T₂₉₁ + ... + T₅₇₁.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 27126661 - 2¹⁵ = 27093893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27126601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32631 + ... + 33451.

It is an arithmetic number, because the mean of its divisors is an integer number (1874160).

Almost surely, 2^27126661 is an apocalyptic number.

It is an amenable number.

27126661 is a deficient number, since it is larger than the sum of its proper divisors (2859899).

27126661 is a wasteful number, since it uses less digits than its factorization.

27126661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924.

The product of its digits is 6048, while the sum is 31.

The square root of 27126661 is about 5208.3261226617. The cubic root of 27126661 is about 300.4683831583.

The spelling of 27126661 in words is "twenty-seven million, one hundred twenty-six thousand, six hundred sixty-one".