217163066 has 16 divisors (see below), whose sum is σ = 347198400. Its totient is φ = 101515200.

The previous prime is 217163059. The next prime is 217163081. The reversal of 217163066 is 660361712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16016 + ... + 26283.

It is an arithmetic number, because the mean of its divisors is an integer number (21699900).

Almost surely, 2^217163066 is an apocalyptic number.

217163066 is a deficient number, since it is larger than the sum of its proper divisors (130035334).

217163066 is a wasteful number, since it uses less digits than its factorization.

217163066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42469.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 217163066 is about 14736.4536439403. The cubic root of 217163066 is about 601.0749858219.

The spelling of 217163066 in words is "two hundred seventeen million, one hundred sixty-three thousand, sixty-six".