6669531773 has 2 divisors, whose sum is σ = 6669531774. Its totient is φ = 6669531772.

The previous prime is 6669531769. The next prime is 6669531857. The reversal of 6669531773 is 3771359666.

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., 5892404644 + 777127129 = 76762^2 + 27877^2 .

It is a cyclic number.

It is not a de Polignac number, because 6669531773 - 2² = 6669531769 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6669531763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334765886 + 3334765887.

It is an arithmetic number, because the mean of its divisors is an integer number (3334765887).

Almost surely, 2^6669531773 is an apocalyptic number.

It is an amenable number.

6669531773 is a deficient number, since it is larger than the sum of its proper divisors (1).

6669531773 is an equidigital number, since it uses as much as digits as its factorization.

6669531773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 53.

The square root of 6669531773 is about 81667.2013295423. The cubic root of 6669531773 is about 1882.3416359759.

The spelling of 6669531773 in words is "six billion, six hundred sixty-nine million, five hundred thirty-one thousand, seven hundred seventy-three".