66548285 has 8 divisors (see below), whose sum is σ = 84555576. Its totient is φ = 50106880.

The previous prime is 66548249. The next prime is 66548291. The reversal of 66548285 is 58284566.

It can be written as a sum of positive squares in 4 ways, for example, as 662596 + 65885689 = 814^2 + 8117^2 .

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

It is not a de Polignac number, because 66548285 - 2⁶ = 66548221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391376 + ... + 391545.

It is an arithmetic number, because the mean of its divisors is an integer number (10569447).

Almost surely, 2^66548285 is an apocalyptic number.

It is an amenable number.

66548285 is a deficient number, since it is larger than the sum of its proper divisors (18007291).

66548285 is a wasteful number, since it uses less digits than its factorization.

66548285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782943.

The product of its digits is 460800, while the sum is 44.

The square root of 66548285 is about 8157.7132212404. The cubic root of 66548285 is about 405.2399837660.

The spelling of 66548285 in words is "sixty-six million, five hundred forty-eight thousand, two hundred eighty-five".