66501717 has 8 divisors (see below), whose sum is σ = 92524224. Its totient is φ = 42406848.

The previous prime is 66501683. The next prime is 66501751. The reversal of 66501717 is 71710566.

It is an interprime number because it is at equal distance from previous prime (66501683) and next prime (66501751).

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

It is not a de Polignac number, because 66501717 - 2¹⁵ = 66468949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66551717) 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, 481828 + ... + 481965.

It is an arithmetic number, because the mean of its divisors is an integer number (11565528).

Almost surely, 2^66501717 is an apocalyptic number.

It is an amenable number.

66501717 is a deficient number, since it is larger than the sum of its proper divisors (26022507).

66501717 is a wasteful number, since it uses less digits than its factorization.

66501717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963819.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 66501717 is about 8154.8584904951. The cubic root of 66501717 is about 405.1454377830.

The spelling of 66501717 in words is "sixty-six million, five hundred one thousand, seven hundred seventeen".