6649672973 has 2 divisors, whose sum is σ = 6649672974. Its totient is φ = 6649672972.

The previous prime is 6649672963. The next prime is 6649672987. The reversal of 6649672973 is 3792769466.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6143737924 + 505935049 = 78382^2 + 22493^2 .

It is a cyclic number.

It is not a de Polignac number, because 6649672973 - 2⁴ = 6649672957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6649672963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3324836486 + 3324836487.

It is an arithmetic number, because the mean of its divisors is an integer number (3324836487).

Almost surely, 2^6649672973 is an apocalyptic number.

It is an amenable number.

6649672973 is a deficient number, since it is larger than the sum of its proper divisors (1).

6649672973 is an equidigital number, since it uses as much as digits as its factorization.

6649672973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 59.

The square root of 6649672973 is about 81545.5269956605. The cubic root of 6649672973 is about 1880.4715292457.

The spelling of 6649672973 in words is "six billion, six hundred forty-nine million, six hundred seventy-two thousand, nine hundred seventy-three".