6221646407 has 2 divisors, whose sum is σ = 6221646408. Its totient is φ = 6221646406.

The previous prime is 6221646391. The next prime is 6221646413. The reversal of 6221646407 is 7046461226.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6221646407 - 2⁴ = 6221646391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6221646427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3110823203 + 3110823204.

It is an arithmetic number, because the mean of its divisors is an integer number (3110823204).

Almost surely, 2^6221646407 is an apocalyptic number.

6221646407 is a deficient number, since it is larger than the sum of its proper divisors (1).

6221646407 is an equidigital number, since it uses as much as digits as its factorization.

6221646407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 6221646407 is about 78877.4137950782. The cubic root of 6221646407 is about 1839.2260456989.

The spelling of 6221646407 in words is "six billion, two hundred twenty-one million, six hundred forty-six thousand, four hundred seven".