4066220 has 12 divisors (see below), whose sum is σ = 8539104. Its totient is φ = 1626480.

The previous prime is 4066219. The next prime is 4066229. The reversal of 4066220 is 226604.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 203311 = 4066220 / (4 + 0 + 6 + 6 + 2 + 2 + 0).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4066192 and 4066201.

It is not an unprimeable number, because it can be changed into a prime (4066229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101636 + ... + 101675.

It is an arithmetic number, because the mean of its divisors is an integer number (711592).

Almost surely, 2^4066220 is an apocalyptic number.

It is an amenable number.

4066220 is an abundant number, since it is smaller than the sum of its proper divisors (4472884).

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

4066220 is a wasteful number, since it uses less digits than its factorization.

4066220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203320 (or 203318 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4066220 is about 2016.4870443422. The cubic root of 4066220 is about 159.6112960307.

The spelling of 4066220 in words is "four million, sixty-six thousand, two hundred twenty".