33945609666 has 8 divisors (see below), whose sum is σ = 67891219344. Its totient is φ = 11315203220.

The previous prime is 33945609637. The next prime is 33945609671. The reversal of 33945609666 is 66690654933.

It is a happy number.

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

33945609666 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2828800800 + ... + 2828800811.

It is an arithmetic number, because the mean of its divisors is an integer number (8486402418).

Almost surely, 2^33945609666 is an apocalyptic number.

33945609666 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.

33945609666 is a wasteful number, since it uses less digits than its factorization.

33945609666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5657601616.

The product of its (nonzero) digits is 18895680, while the sum is 57.

The spelling of 33945609666 in words is "thirty-three billion, nine hundred forty-five million, six hundred nine thousand, six hundred sixty-six".