420611866 has 16 divisors (see below), whose sum is σ = 647536680. Its totient is φ = 204785920.

The previous prime is 420611861. The next prime is 420611899. The reversal of 420611866 is 668116024.

It can be written as a sum of positive squares in 4 ways, for example, as 83338641 + 337273225 = 9129^2 + 18365^2 .

It is not an unprimeable number, because it can be changed into a prime (420611861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41070 + ... + 50278.

Almost surely, 2^420611866 is an apocalyptic number.

420611866 is a deficient number, since it is larger than the sum of its proper divisors (226924814).

420611866 is a wasteful number, since it uses less digits than its factorization.

420611866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9809.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 420611866 is about 20508.8241008596. The cubic root of 420611866 is about 749.2507278524.

The spelling of 420611866 in words is "four hundred twenty million, six hundred eleven thousand, eight hundred sixty-six".