66260217 has 8 divisors (see below), whose sum is σ = 92188224. Its totient is φ = 42252848.

The previous prime is 66260197. The next prime is 66260231. The reversal of 66260217 is 71206266.

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 66260217 - 2¹² = 66256121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66260267) 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, 480078 + ... + 480215.

It is an arithmetic number, because the mean of its divisors is an integer number (11523528).

Almost surely, 2^66260217 is an apocalyptic number.

It is an amenable number.

66260217 is a deficient number, since it is larger than the sum of its proper divisors (25928007).

66260217 is a wasteful number, since it uses less digits than its factorization.

66260217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960319.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 66260217 is about 8140.0378991747. The cubic root of 66260217 is about 404.6544163719.

The spelling of 66260217 in words is "sixty-six million, two hundred sixty thousand, two hundred seventeen".