216666666612 has 96 divisors (see below), whose sum is σ = 648841415040. Its totient is φ = 61794408960.

The previous prime is 216666666599. The next prime is 216666666631.

216666666612 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5343903 + ... + 5384294.

It is an arithmetic number, because the mean of its divisors is an integer number (6758764740).

Almost surely, 2^216666666612 is an apocalyptic number.

216666666612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216666666612 is an abundant number, since it is smaller than the sum of its proper divisors (432174748428).

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

216666666612 is a wasteful number, since it uses less digits than its factorization.

216666666612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10728238 (or 10728230 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 54.

The spelling of 216666666612 in words is "two hundred sixteen billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred twelve".