6646147373 has 2 divisors, whose sum is σ = 6646147374. Its totient is φ = 6646147372.

The previous prime is 6646147337. The next prime is 6646147397. The reversal of 6646147373 is 3737416466.

6646147373 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (6646147337) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6155657764 + 490489609 = 78458^2 + 22147^2 .

It is a cyclic number.

It is not a de Polignac number, because 6646147373 - 2⁶ = 6646147309 is a prime.

It is a super-2 number, since 2×6646147373² = 88342549807269602258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6646147303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323073686 + 3323073687.

It is an arithmetic number, because the mean of its divisors is an integer number (3323073687).

Almost surely, 2^6646147373 is an apocalyptic number.

It is an amenable number.

6646147373 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646147373 is an equidigital number, since it uses as much as digits as its factorization.

6646147373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 47.

The square root of 6646147373 is about 81523.9067574659. The cubic root of 6646147373 is about 1880.1391338291.

The spelling of 6646147373 in words is "six billion, six hundred forty-six million, one hundred forty-seven thousand, three hundred seventy-three".