4220666442 has 48 divisors (see below), whose sum is σ = 9411790752. Its totient is φ = 1365971040.

The previous prime is 4220666431. The next prime is 4220666507. The reversal of 4220666442 is 2446660224.

It is a junction number, because it is equal to n+sod(n) for n = 4220666397 and 4220666406.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 320553 + ... + 333459.

It is an arithmetic number, because the mean of its divisors is an integer number (196078974).

Almost surely, 2^4220666442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4220666442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4705895376).

4220666442 is an abundant number, since it is smaller than the sum of its proper divisors (5191124310).

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

4220666442 is a wasteful number, since it uses less digits than its factorization.

4220666442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13443 (or 13440 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The square root of 4220666442 is about 64966.6563861801. The cubic root of 4220666442 is about 1616.0706530251.

The spelling of 4220666442 in words is "four billion, two hundred twenty million, six hundred sixty-six thousand, four hundred forty-two".