665155606 has 8 divisors (see below), whose sum is σ = 998411544. Its totient is φ = 332351760.

The previous prime is 665155597. The next prime is 665155613. The reversal of 665155606 is 606551566.

665155606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109320 + ... + 115243.

It is an arithmetic number, because the mean of its divisors is an integer number (124801443).

Almost surely, 2^665155606 is an apocalyptic number.

665155606 is a deficient number, since it is larger than the sum of its proper divisors (333255938).

665155606 is a wasteful number, since it uses less digits than its factorization.

665155606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226046.

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 665155606 is about 25790.6108109133. The cubic root of 665155606 is about 872.9199489052.

The spelling of 665155606 in words is "six hundred sixty-five million, one hundred fifty-five thousand, six hundred six".