216666102 has 16 divisors (see below), whose sum is σ = 433618992. Its totient is φ = 72174240.

The previous prime is 216666097. The next prime is 216666103. The reversal of 216666102 is 201666612.

It is a self number, because there is not a number n which added to its sum of digits gives 216666102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216666103) by changing a digit.

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, 1413 + ... + 20864.

It is an arithmetic number, because the mean of its divisors is an integer number (27101187).

Almost surely, 2^216666102 is an apocalyptic number.

216666102 is an abundant number, since it is smaller than the sum of its proper divisors (216952890).

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

216666102 is a wasteful number, since it uses less digits than its factorization.

216666102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23903.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 216666102 is about 14719.5822630943. The cubic root of 216666102 is about 600.6161282046.

It can be divided in two parts, 21666610 and 2, that added together give a palindrome (21666612).

The spelling of 216666102 in words is "two hundred sixteen million, six hundred sixty-six thousand, one hundred two".