66548245 has 4 divisors (see below), whose sum is σ = 79857900. Its totient is φ = 53238592.

The previous prime is 66548233. The next prime is 66548249. The reversal of 66548245 is 54284566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7918596 + 58629649 = 2814^2 + 7657^2 .

It is a cyclic number.

It is not a de Polignac number, because 66548245 - 2⁵ = 66548213 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 66548198 and 66548207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66548249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6654820 + ... + 6654829.

It is an arithmetic number, because the mean of its divisors is an integer number (19964475).

Almost surely, 2^66548245 is an apocalyptic number.

It is an amenable number.

66548245 is a deficient number, since it is larger than the sum of its proper divisors (13309655).

66548245 is a wasteful number, since it uses less digits than its factorization.

66548245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13309654.

The product of its digits is 230400, while the sum is 40.

The square root of 66548245 is about 8157.7107695726. The cubic root of 66548245 is about 405.2399025738.

The spelling of 66548245 in words is "sixty-six million, five hundred forty-eight thousand, two hundred forty-five".