66066210 has 144 divisors (see below), whose sum is σ = 203591232. Its totient is φ = 14817600.

The previous prime is 66066197. The next prime is 66066227. The reversal of 66066210 is 1266066.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 313005 + ... + 313215.

It is an arithmetic number, because the mean of its divisors is an integer number (1413828).

Almost surely, 2^66066210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66066210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101795616).

66066210 is an abundant number, since it is smaller than the sum of its proper divisors (137525022).

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

66066210 is a wasteful number, since it uses less digits than its factorization.

66066210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 66066210 is about 8128.1123269797. The cubic root of 66066210 is about 404.2590935156.

The spelling of 66066210 in words is "sixty-six million, sixty-six thousand, two hundred ten".