66050217 has 12 divisors (see below), whose sum is σ = 97984900. Its totient is φ = 42843168.

The previous prime is 66050209. The next prime is 66050249. The reversal of 66050217 is 71205066.

It can be written as a sum of positive squares in 2 ways, for example, as 63297936 + 2752281 = 7956^2 + 1659^2 .

It is not a de Polignac number, because 66050217 - 2³ = 66050209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66050207) 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 11 ways as a sum of consecutive naturals, for example, 98842 + ... + 99507.

Almost surely, 2^66050217 is an apocalyptic number.

It is an amenable number.

66050217 is a deficient number, since it is larger than the sum of its proper divisors (31934683).

66050217 is a wasteful number, since it uses less digits than its factorization.

66050217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198392 (or 198389 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 66050217 is about 8127.1284596713. The cubic root of 66050217 is about 404.2264704977.

The spelling of 66050217 in words is "sixty-six million, fifty thousand, two hundred seventeen".