66562166220 has 48 divisors (see below), whose sum is σ = 203317164288. Its totient is φ = 16136282560.

The previous prime is 66562166207. The next prime is 66562166227. The reversal of 66562166220 is 2266126566.

It is not an unprimeable number, because it can be changed into a prime (66562166227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50425224 + ... + 50426543.

It is an arithmetic number, because the mean of its divisors is an integer number (4235774256).

Almost surely, 2^66562166220 is an apocalyptic number.

66562166220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66562166220 is an abundant number, since it is smaller than the sum of its proper divisors (136754998068).

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

66562166220 is a wasteful number, since it uses less digits than its factorization.

66562166220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100851790 (or 100851788 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 66562166220 in words is "sixty-six billion, five hundred sixty-two million, one hundred sixty-six thousand, two hundred twenty".