666038606 has 4 divisors (see below), whose sum is σ = 999057912. Its totient is φ = 333019302.

The previous prime is 666038587. The next prime is 666038707. The reversal of 666038606 is 606830666.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166509650 + ... + 166509653.

It is an arithmetic number, because the mean of its divisors is an integer number (249764478).

Almost surely, 2^666038606 is an apocalyptic number.

666038606 is a deficient number, since it is larger than the sum of its proper divisors (333019306).

666038606 is a wasteful number, since it uses less digits than its factorization.

666038606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333019305.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 666038606 is about 25807.7237663456. The cubic root of 666038606 is about 873.3060477785.

The spelling of 666038606 in words is "six hundred sixty-six million, thirty-eight thousand, six hundred six".