4220042661 has 12 divisors (see below), whose sum is σ = 6237376288. Its totient is φ = 2747934504.

The previous prime is 4220042587. The next prime is 4220042663. The reversal of 4220042661 is 1662400224.

It is not a de Polignac number, because 4220042661 - 2¹¹ = 4220040613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220042663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5451865 + ... + 5452638.

Almost surely, 2^4220042661 is an apocalyptic number.

It is an amenable number.

4220042661 is a deficient number, since it is larger than the sum of its proper divisors (2017333627).

4220042661 is a wasteful number, since it uses less digits than its factorization.

4220042661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10904552 (or 10904549 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 4220042661 is about 64961.8554307064. The cubic root of 4220042661 is about 1615.9910349642.

Adding to 4220042661 its reverse (1662400224), we get a palindrome (5882442885).

The spelling of 4220042661 in words is "four billion, two hundred twenty million, forty-two thousand, six hundred sixty-one".