665066606 has 4 divisors (see below), whose sum is σ = 997599912. Its totient is φ = 332533302.

The previous prime is 665066593. The next prime is 665066621. The reversal of 665066606 is 606660566.

665066606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166266650 + ... + 166266653.

It is an arithmetic number, because the mean of its divisors is an integer number (249399978).

Almost surely, 2^665066606 is an apocalyptic number.

665066606 is a deficient number, since it is larger than the sum of its proper divisors (332533306).

665066606 is a wasteful number, since it uses less digits than its factorization.

665066606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332533305.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 665066606 is about 25788.8853190672. The cubic root of 665066606 is about 872.8810139853.

The spelling of 665066606 in words is "six hundred sixty-five million, sixty-six thousand, six hundred six".