4220641566 has 40 divisors (see below), whose sum is σ = 9461292984. Its totient is φ = 1406296080.

The previous prime is 4220641559. The next prime is 4220641577. The reversal of 4220641566 is 6651460224.

4220641566 is a `hidden beast` number, since 4 + 2 + 2 + 0 + 641 + 5 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 4220641566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 581701 + ... + 588911.

Almost surely, 2^4220641566 is an apocalyptic number.

4220641566 is an abundant number, since it is smaller than the sum of its proper divisors (5240651418).

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

4220641566 is a wasteful number, since it uses less digits than its factorization.

4220641566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10838 (or 10829 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 4220641566 is about 64966.4649338411. The cubic root of 4220641566 is about 1616.0674780563.

The spelling of 4220641566 in words is "four billion, two hundred twenty million, six hundred forty-one thousand, five hundred sixty-six".