66548172 has 12 divisors (see below), whose sum is σ = 155279096. Its totient is φ = 22182720.

The previous prime is 66548147. The next prime is 66548201. The reversal of 66548172 is 27184566.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66548172.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2772829 + ... + 2772852.

Almost surely, 2^66548172 is an apocalyptic number.

It is an amenable number.

66548172 is an abundant number, since it is smaller than the sum of its proper divisors (88730924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66548172 is a wasteful number, since it uses less digits than its factorization.

66548172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5545688 (or 5545686 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 66548172 is about 8157.7062952769. The cubic root of 66548172 is about 405.2397543980.

The spelling of 66548172 in words is "sixty-six million, five hundred forty-eight thousand, one hundred seventy-two".