66132447 has 8 divisors (see below), whose sum is σ = 88811520. Its totient is φ = 43770840.

The previous prime is 66132439. The next prime is 66132449. The reversal of 66132447 is 74423166.

It is a happy number.

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

It is not a de Polignac number, because 66132447 - 2³ = 66132439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66132449) 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, 78879 + ... + 79712.

It is an arithmetic number, because the mean of its divisors is an integer number (11101440).

Almost surely, 2^66132447 is an apocalyptic number.

66132447 is a deficient number, since it is larger than the sum of its proper divisors (22679073).

66132447 is a wasteful number, since it uses less digits than its factorization.

66132447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158733.

The product of its digits is 24192, while the sum is 33.

The square root of 66132447 is about 8132.1858685104. The cubic root of 66132447 is about 404.3941497763.

The spelling of 66132447 in words is "sixty-six million, one hundred thirty-two thousand, four hundred forty-seven".