66600648 has 96 divisors (see below), whose sum is σ = 190045440. Its totient is φ = 21041280.

The previous prime is 66600631. The next prime is 66600671. The reversal of 66600648 is 84600666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 118015 + ... + 118577.

It is an arithmetic number, because the mean of its divisors is an integer number (1979640).

Almost surely, 2^66600648 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 66600648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95022720).

66600648 is an abundant number, since it is smaller than the sum of its proper divisors (123444792).

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

66600648 is a wasteful number, since it uses less digits than its factorization.

66600648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 66600648 is about 8160.9220067343. The cubic root of 66600648 is about 405.3462425434.

The spelling of 66600648 in words is "sixty-six million, six hundred thousand, six hundred forty-eight".