6646147117 has 2 divisors, whose sum is σ = 6646147118. Its totient is φ = 6646147116.

The previous prime is 6646147111. The next prime is 6646147129. The reversal of 6646147117 is 7117416466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6570561481 + 75585636 = 81059^2 + 8694^2 .

It is a cyclic number.

It is not a de Polignac number, because 6646147117 - 2⁷ = 6646146989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6646147111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323073558 + 3323073559.

It is an arithmetic number, because the mean of its divisors is an integer number (3323073559).

Almost surely, 2^6646147117 is an apocalyptic number.

It is an amenable number.

6646147117 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646147117 is an equidigital number, since it uses as much as digits as its factorization.

6646147117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 6646147117 is about 81523.9051873743. The cubic root of 6646147117 is about 1880.1391096890.

The spelling of 6646147117 in words is "six billion, six hundred forty-six million, one hundred forty-seven thousand, one hundred seventeen".