216516670 has 8 divisors (see below), whose sum is σ = 389730024. Its totient is φ = 86606664.

The previous prime is 216516667. The next prime is 216516673. The reversal of 216516670 is 76615612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (216516667) and next prime (216516673).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216516673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10825824 + ... + 10825843.

It is an arithmetic number, because the mean of its divisors is an integer number (48716253).

Almost surely, 2^216516670 is an apocalyptic number.

216516670 is a deficient number, since it is larger than the sum of its proper divisors (173213354).

216516670 is a wasteful number, since it uses less digits than its factorization.

216516670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21651674.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 216516670 is about 14714.5054283180. The cubic root of 216516670 is about 600.4780172129.

The spelling of 216516670 in words is "two hundred sixteen million, five hundred sixteen thousand, six hundred seventy".