66666327 has 16 divisors (see below), whose sum is σ = 109401600. Its totient is φ = 35164512.

The previous prime is 66666323. The next prime is 66666343. The reversal of 66666327 is 72366666.

It is not a de Polignac number, because 66666327 - 2² = 66666323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66666323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121827 + ... + 122372.

It is an arithmetic number, because the mean of its divisors is an integer number (6837600).

Almost surely, 2^66666327 is an apocalyptic number.

66666327 is a deficient number, since it is larger than the sum of its proper divisors (42735273).

66666327 is a wasteful number, since it uses less digits than its factorization.

66666327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244222.

The product of its digits is 326592, while the sum is 42.

The square root of 66666327 is about 8164.9450090004. The cubic root of 66666327 is about 405.4794443966.

The spelling of 66666327 in words is "sixty-six million, six hundred sixty-six thousand, three hundred twenty-seven".