660717133 has 8 divisors (see below), whose sum is σ = 673564896. Its totient is φ = 647883600.

The previous prime is 660717131. The next prime is 660717137. The reversal of 660717133 is 331717066.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 660717133 - 2¹ = 660717131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660717131) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 183238 + ... + 186808.

It is an arithmetic number, because the mean of its divisors is an integer number (84195612).

Almost surely, 2^660717133 is an apocalyptic number.

It is an amenable number.

660717133 is a deficient number, since it is larger than the sum of its proper divisors (12847763).

660717133 is a wasteful number, since it uses less digits than its factorization.

660717133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7115.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 660717133 is about 25704.4185501248. The cubic root of 660717133 is about 870.9739974653.

The spelling of 660717133 in words is "six hundred sixty million, seven hundred seventeen thousand, one hundred thirty-three".