66755427 has 8 divisors (see below), whose sum is σ = 89605200. Its totient is φ = 44204640.

The previous prime is 66755389. The next prime is 66755441. The reversal of 66755427 is 72455766.

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

It is not a de Polignac number, because 66755427 - 2¹² = 66751331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66755027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74224 + ... + 75117.

It is an arithmetic number, because the mean of its divisors is an integer number (11200650).

Almost surely, 2^66755427 is an apocalyptic number.

66755427 is a deficient number, since it is larger than the sum of its proper divisors (22849773).

66755427 is a wasteful number, since it uses less digits than its factorization.

66755427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149493.

The product of its digits is 352800, while the sum is 42.

The square root of 66755427 is about 8170.3994394399. The cubic root of 66755427 is about 405.6600059928.

The spelling of 66755427 in words is "sixty-six million, seven hundred fifty-five thousand, four hundred twenty-seven".