216664711 has 16 divisors (see below), whose sum is σ = 236472480. Its totient is φ = 197683200.

The previous prime is 216664709. The next prime is 216664727. The reversal of 216664711 is 117466612.

It is a cyclic number.

It is not a de Polignac number, because 216664711 - 2¹ = 216664709 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 (216664751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251800 + ... + 252658.

It is an arithmetic number, because the mean of its divisors is an integer number (14779530).

Almost surely, 2^216664711 is an apocalyptic number.

216664711 is a deficient number, since it is larger than the sum of its proper divisors (19807769).

216664711 is a wasteful number, since it uses less digits than its factorization.

216664711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314.

The product of its digits is 12096, while the sum is 34.

The square root of 216664711 is about 14719.5350130362. The cubic root of 216664711 is about 600.6148428800.

The spelling of 216664711 in words is "two hundred sixteen million, six hundred sixty-four thousand, seven hundred eleven".