216706670 has 16 divisors (see below), whose sum is σ = 399144240. Its totient is φ = 84666624.

The previous prime is 216706661. The next prime is 216706681. The reversal of 216706670 is 76607612.

It is a self number, because there is not a number n which added to its sum of digits gives 216706670.

It is a congruent number.

It is an unprimeable number.

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, 251555 + ... + 252414.

It is an arithmetic number, because the mean of its divisors is an integer number (24946515).

Almost surely, 2^216706670 is an apocalyptic number.

216706670 is a deficient number, since it is larger than the sum of its proper divisors (182437570).

216706670 is a wasteful number, since it uses less digits than its factorization.

216706670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504019.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 216706670 is about 14720.9602268330. The cubic root of 216706670 is about 600.6536118016.

The spelling of 216706670 in words is "two hundred sixteen million, seven hundred six thousand, six hundred seventy".