66209006 has 8 divisors (see below), whose sum is σ = 99350280. Its totient is φ = 33092248.

The previous prime is 66208993. The next prime is 66209009. The reversal of 66209006 is 60090266.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66209006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66209009) 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, 3920 + ... + 12156.

It is an arithmetic number, because the mean of its divisors is an integer number (12418785).

Almost surely, 2^66209006 is an apocalyptic number.

66209006 is a deficient number, since it is larger than the sum of its proper divisors (33141274).

66209006 is a wasteful number, since it uses less digits than its factorization.

66209006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12258.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66209006 is about 8136.8916669696. The cubic root of 66209006 is about 404.5501401346.

The spelling of 66209006 in words is "sixty-six million, two hundred nine thousand, six".