216665334 has 16 divisors (see below), whose sum is σ = 481478640. Its totient is φ = 72221760.

The previous prime is 216665333. The next prime is 216665353. The reversal of 216665334 is 433566612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216665333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2006107 + ... + 2006214.

It is an arithmetic number, because the mean of its divisors is an integer number (30092415).

Almost surely, 2^216665334 is an apocalyptic number.

216665334 is an abundant number, since it is smaller than the sum of its proper divisors (264813306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216665334 is a wasteful number, since it uses less digits than its factorization.

216665334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4012332 (or 4012326 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 216665334 is about 14719.5561753743. The cubic root of 216665334 is about 600.6154185509.

It can be divided in two parts, 21666 and 5334, that added together give a cube (27000 = 30³).

The spelling of 216665334 in words is "two hundred sixteen million, six hundred sixty-five thousand, three hundred thirty-four".