6646546273 has 2 divisors, whose sum is σ = 6646546274. Its totient is φ = 6646546272.

The previous prime is 6646546241. The next prime is 6646546303. The reversal of 6646546273 is 3726456466.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4936889169 + 1709657104 = 70263^2 + 41348^2 .

It is a cyclic number.

It is not a de Polignac number, because 6646546273 - 2⁵ = 6646546241 is a prime.

It is not a weakly prime, because it can be changed into another prime (6646546373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323273136 + 3323273137.

It is an arithmetic number, because the mean of its divisors is an integer number (3323273137).

Almost surely, 2^6646546273 is an apocalyptic number.

It is an amenable number.

6646546273 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646546273 is an equidigital number, since it uses as much as digits as its factorization.

6646546273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 49.

The square root of 6646546273 is about 81526.3532423719. The cubic root of 6646546273 is about 1880.1767482271.

The spelling of 6646546273 in words is "six billion, six hundred forty-six million, five hundred forty-six thousand, two hundred seventy-three".