221646221614660 has 24 divisors (see below), whose sum is σ = 469976066030016. Its totient is φ = 87797726619360.

The previous prime is 221646221614637. The next prime is 221646221614667. The reversal of 221646221614660 is 66416122646122.

It is not an unprimeable number, because it can be changed into a prime (221646221614667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53797624546 + ... + 53797628665.

It is an arithmetic number, because the mean of its divisors is an integer number (19582336084584).

Almost surely, 2^{221646221614660} is an apocalyptic number.

221646221614660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221646221614660 is an abundant number, since it is smaller than the sum of its proper divisors (248329844415356).

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

221646221614660 is a wasteful number, since it uses less digits than its factorization.

221646221614660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107595253323 (or 107595253321 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 49.

The spelling of 221646221614660 in words is "two hundred twenty-one trillion, six hundred forty-six billion, two hundred twenty-one million, six hundred fourteen thousand, six hundred sixty".