66648276 has 72 divisors (see below), whose sum is σ = 178869600. Its totient is φ = 20865600.

The previous prime is 66648269. The next prime is 66648289. The reversal of 66648276 is 67284666.

Its product of digits (580608) is a multiple of the sum of its prime divisors (864).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94726 + ... + 95426.

It is an arithmetic number, because the mean of its divisors is an integer number (2484300).

Almost surely, 2^66648276 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 66648276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89434800).

66648276 is an abundant number, since it is smaller than the sum of its proper divisors (112221324).

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

66648276 is a wasteful number, since it uses less digits than its factorization.

66648276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 864 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 66648276 is about 8163.8395378645. The cubic root of 66648276 is about 405.4428443594.

The spelling of 66648276 in words is "sixty-six million, six hundred forty-eight thousand, two hundred seventy-six".