66717133 has 8 divisors (see below), whose sum is σ = 76432640. Its totient is φ = 57047760.

The previous prime is 66717107. The next prime is 66717137. The reversal of 66717133 is 33171766.

It is a happy number.

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

It is not a de Polignac number, because 66717133 - 2⁹ = 66716621 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 (66717137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8373 + ... + 14266.

It is an arithmetic number, because the mean of its divisors is an integer number (9554080).

Almost surely, 2^66717133 is an apocalyptic number.

It is an amenable number.

66717133 is a deficient number, since it is larger than the sum of its proper divisors (9715507).

66717133 is a wasteful number, since it uses less digits than its factorization.

66717133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23067.

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

The square root of 66717133 is about 8168.0556437870. The cubic root of 66717133 is about 405.5824227094.

Adding to 66717133 its reverse (33171766), we get a palindrome (99888899).

The spelling of 66717133 in words is "sixty-six million, seven hundred seventeen thousand, one hundred thirty-three".