666071356 has 12 divisors (see below), whose sum is σ = 1234191168. Its totient is φ = 313445312.

The previous prime is 666071327. The next prime is 666071389. The reversal of 666071356 is 653170666.

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 in 3 ways as a sum of consecutive naturals, for example, 4897516 + ... + 4897651.

It is an arithmetic number, because the mean of its divisors is an integer number (102849264).

Almost surely, 2^666071356 is an apocalyptic number.

It is an amenable number.

666071356 is a deficient number, since it is larger than the sum of its proper divisors (568119812).

666071356 is a wasteful number, since it uses less digits than its factorization.

666071356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9795188 (or 9795186 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 666071356 is about 25808.3582585177. The cubic root of 666071356 is about 873.3203614154.

The spelling of 666071356 in words is "six hundred sixty-six million, seventy-one thousand, three hundred fifty-six".