6216666651 has 40 divisors (see below), whose sum is σ = 10092919760. Its totient is φ = 3790473408.

The previous prime is 6216666611. The next prime is 6216666679. The reversal of 6216666651 is 1566666126.

It is not a de Polignac number, because 6216666651 - 2⁹ = 6216666139 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6216666597 and 6216666606.

It is not an unprimeable number, because it can be changed into a prime (6216666611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 87696 + ... + 141858.

It is an arithmetic number, because the mean of its divisors is an integer number (252322994).

Almost surely, 2^6216666651 is an apocalyptic number.

6216666651 is a deficient number, since it is larger than the sum of its proper divisors (3876253109).

6216666651 is a wasteful number, since it uses less digits than its factorization.

6216666651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54297 (or 54288 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 6216666651 is about 78845.8410507492. The cubic root of 6216666651 is about 1838.7352141197.

The spelling of 6216666651 in words is "six billion, two hundred sixteen million, six hundred sixty-six thousand, six hundred fifty-one".