66248544 has 24 divisors (see below), whose sum is σ = 173902680. Its totient is φ = 22082816.

The previous prime is 66248503. The next prime is 66248549. The reversal of 66248544 is 44584266.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66248549) 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, 344949 + ... + 345140.

It is an arithmetic number, because the mean of its divisors is an integer number (7245945).

Almost surely, 2^66248544 is an apocalyptic number.

It is an amenable number.

66248544 is an abundant number, since it is smaller than the sum of its proper divisors (107654136).

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

66248544 is a wasteful number, since it uses less digits than its factorization.

66248544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690102 (or 690094 counting only the distinct ones).

The product of its digits is 184320, while the sum is 39.

The square root of 66248544 is about 8139.3208561894. The cubic root of 66248544 is about 404.6306524473.

The spelling of 66248544 in words is "sixty-six million, two hundred forty-eight thousand, five hundred forty-four".