4256219666 has 8 divisors (see below), whose sum is σ = 6384613644. Its totient is φ = 2128015120.

The previous prime is 4256219647. The next prime is 4256219699. The reversal of 4256219666 is 6669126524.

It can be written as a sum of positive squares in 2 ways, for example, as 4083849025 + 172370641 = 63905^2 + 13129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4256219666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44276 + ... + 102336.

Almost surely, 2^4256219666 is an apocalyptic number.

4256219666 is a deficient number, since it is larger than the sum of its proper divisors (2128393978).

4256219666 is a wasteful number, since it uses less digits than its factorization.

4256219666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94716.

The product of its digits is 933120, while the sum is 47.

The square root of 4256219666 is about 65239.7092728041. The cubic root of 4256219666 is about 1620.5956842539.

The spelling of 4256219666 in words is "four billion, two hundred fifty-six million, two hundred nineteen thousand, six hundred sixty-six".