66018648 has 64 divisors (see below), whose sum is σ = 173376000. Its totient is φ = 20908800.

The previous prime is 66018647. The next prime is 66018709. The reversal of 66018648 is 84681066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66018643) 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 15 ways as a sum of consecutive naturals, for example, 109548 + ... + 110148.

It is an arithmetic number, because the mean of its divisors is an integer number (2709000).

Almost surely, 2^66018648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66018648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86688000).

66018648 is an abundant number, since it is smaller than the sum of its proper divisors (107357352).

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

66018648 is a wasteful number, since it uses less digits than its factorization.

66018648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 66018648 is about 8125.1860286396. The cubic root of 66018648 is about 404.1620596114.

It can be divided in two parts, 66018 and 648, that added together give a palindrome (66666).

The spelling of 66018648 in words is "sixty-six million, eighteen thousand, six hundred forty-eight".