6616447 has 2 divisors, whose sum is σ = 6616448. Its totient is φ = 6616446.

The previous prime is 6616403. The next prime is 6616469. The reversal of 6616447 is 7446166.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6616447 - 2¹⁹ = 6092159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6611447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3308223 + 3308224.

It is an arithmetic number, because the mean of its divisors is an integer number (3308224).

Almost surely, 2^6616447 is an apocalyptic number.

6616447 is a deficient number, since it is larger than the sum of its proper divisors (1).

6616447 is an equidigital number, since it uses as much as digits as its factorization.

6616447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 6616447 is about 2572.2455170531. The cubic root of 6616447 is about 187.7334289746.

The spelling of 6616447 in words is "six million, six hundred sixteen thousand, four hundred forty-seven".