66209082 has 8 divisors (see below), whose sum is σ = 132418176. Its totient is φ = 22069692.

The previous prime is 66209069. The next prime is 66209083. The reversal of 66209082 is 28090266.

It is a sphenic number, since it is the product of 3 distinct primes.

66209082 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66209083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5517418 + ... + 5517429.

It is an arithmetic number, because the mean of its divisors is an integer number (16552272).

Almost surely, 2^66209082 is an apocalyptic number.

66209082 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66209082 is a wasteful number, since it uses less digits than its factorization.

66209082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11034852.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 66209082 is about 8136.8963370563. The cubic root of 66209082 is about 404.5502949263.

The spelling of 66209082 in words is "sixty-six million, two hundred nine thousand, eighty-two".