220166211305640 has 128 divisors (see below), whose sum is σ = 670844131776000. Its totient is φ = 57795800444928.

The previous prime is 220166211305629. The next prime is 220166211305647. The reversal of 220166211305640 is 46503112661022.

It is not an unprimeable number, because it can be changed into a prime (220166211305647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31262635 + ... + 37652154.

It is an arithmetic number, because the mean of its divisors is an integer number (5240969779500).

Almost surely, 2^{220166211305640} is an apocalyptic number.

220166211305640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220166211305640 is an abundant number, since it is smaller than the sum of its proper divisors (450677920470360).

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

220166211305640 is a wasteful number, since it uses less digits than its factorization.

220166211305640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68915219 (or 68915215 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

Adding to 220166211305640 its reverse (46503112661022), we get a palindrome (266669323966662).

The spelling of 220166211305640 in words is "two hundred twenty trillion, one hundred sixty-six billion, two hundred eleven million, three hundred five thousand, six hundred forty".