216618676 has 12 divisors (see below), whose sum is σ = 387148608. Its totient is φ = 106004792.

The previous prime is 216618673. The next prime is 216618679. The reversal of 216618676 is 676816612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (216618673) and next prime (216618679).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216618673) 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, 575926 + ... + 576301.

It is an arithmetic number, because the mean of its divisors is an integer number (32262384).

Almost surely, 2^216618676 is an apocalyptic number.

It is an amenable number.

216618676 is a deficient number, since it is larger than the sum of its proper divisors (170529932).

216618676 is a wasteful number, since it uses less digits than its factorization.

216618676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152278 (or 1152276 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 216618676 is about 14717.9711917098. The cubic root of 216618676 is about 600.5723020918.

The spelling of 216618676 in words is "two hundred sixteen million, six hundred eighteen thousand, six hundred seventy-six".