221466680 has 32 divisors (see below), whose sum is σ = 499303440. Its totient is φ = 88408320.

The previous prime is 221466673. The next prime is 221466683. The reversal of 221466680 is 86664122.

221466680 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 221466680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221466683) 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, 15527 + ... + 26153.

Almost surely, 2^221466680 is an apocalyptic number.

221466680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221466680 is an abundant number, since it is smaller than the sum of its proper divisors (277836760).

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

221466680 is a wasteful number, since it uses less digits than its factorization.

221466680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11159 (or 11155 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 221466680 is about 14881.7566167439. The cubic root of 221466680 is about 605.0196291698.

The spelling of 221466680 in words is "two hundred twenty-one million, four hundred sixty-six thousand, six hundred eighty".