66706117 has 8 divisors (see below), whose sum is σ = 67459392. Its totient is φ = 65956800.

The previous prime is 66706111. The next prime is 66706121. The reversal of 66706117 is 71160766.

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 66706117 - 2²³ = 58317509 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 (66706111) 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, 43392 + ... + 44902.

It is an arithmetic number, because the mean of its divisors is an integer number (8432424).

Almost surely, 2^66706117 is an apocalyptic number.

It is an amenable number.

66706117 is a deficient number, since it is larger than the sum of its proper divisors (753275).

66706117 is a wasteful number, since it uses less digits than its factorization.

66706117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 66706117 is about 8167.3812816594. The cubic root of 66706117 is about 405.5600988989.

The spelling of 66706117 in words is "sixty-six million, seven hundred six thousand, one hundred seventeen".