66648036 has 72 divisors (see below), whose sum is σ = 194839680. Its totient is φ = 17575488.

The previous prime is 66648031. The next prime is 66648059. The reversal of 66648036 is 63084666.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 66647985 and 66648003.

It is not an unprimeable number, because it can be changed into a prime (66648031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3285 + ... + 12003.

Almost surely, 2^66648036 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 66648036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97419840).

66648036 is an abundant number, since it is smaller than the sum of its proper divisors (128191644).

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

66648036 is a wasteful number, since it uses less digits than its factorization.

66648036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8753 (or 8744 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 66648036 is about 8163.8248388853. The cubic root of 66648036 is about 405.4423576931.

The spelling of 66648036 in words is "sixty-six million, six hundred forty-eight thousand, thirty-six".