4216666538 has 16 divisors (see below), whose sum is σ = 7364960640. Its totient is φ = 1773045456.

The previous prime is 4216666537. The next prime is 4216666547. The reversal of 4216666538 is 8356666124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 4216666492 and 4216666501.

It is not an unprimeable number, because it can be changed into a prime (4216666537) 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 7 ways as a sum of consecutive naturals, for example, 2840678 + ... + 2842161.

It is an arithmetic number, because the mean of its divisors is an integer number (460310040).

Almost surely, 2^4216666538 is an apocalyptic number.

4216666538 is a deficient number, since it is larger than the sum of its proper divisors (3148294102).

4216666538 is a wasteful number, since it uses less digits than its factorization.

4216666538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5682901.

The product of its digits is 1244160, while the sum is 47.

The square root of 4216666538 is about 64935.8648052061. The cubic root of 4216666538 is about 1615.5599777056.

The spelling of 4216666538 in words is "four billion, two hundred sixteen million, six hundred sixty-six thousand, five hundred thirty-eight".