6622216129 has 9 divisors (see below), whose sum is σ = 6990730113. Its totient is φ = 6272213652.

The previous prime is 6622216121. The next prime is 6622216213. The reversal of 6622216129 is 9216122266.

The square root of 6622216129 is 81377.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 6622216129 - 2³ = 6622216121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6622216121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1544022 + ... + 1548304.

Almost surely, 2^6622216129 is an apocalyptic number.

6622216129 is the 81377-th square number.

6622216129 is the 40689-th centered octagonal number.

It is an amenable number.

6622216129 is a deficient number, since it is larger than the sum of its proper divisors (368513984).

6622216129 is an frugal number, since it uses more digits than its factorization.

6622216129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8604 (or 4302 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The cubic root of 6622216129 is about 1877.8797706948.

The spelling of 6622216129 in words is "six billion, six hundred twenty-two million, two hundred sixteen thousand, one hundred twenty-nine".