66841600 has 132 divisors (see below), whose sum is σ = 189863344. Its totient is φ = 22855680.

The previous prime is 66841597. The next prime is 66841613. The reversal of 66841600 is 614866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179014 + ... + 179386.

Almost surely, 2^66841600 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 66841600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94931672).

66841600 is an abundant number, since it is smaller than the sum of its proper divisors (123021744).

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

66841600 is a wasteful number, since it uses less digits than its factorization.

66841600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 66841600 is about 8175.6712262664. The cubic root of 66841600 is about 405.8344832368.

The spelling of 66841600 in words is "sixty-six million, eight hundred forty-one thousand, six hundred".