6669977893 has 2 divisors, whose sum is σ = 6669977894. Its totient is φ = 6669977892.

The previous prime is 6669977879. The next prime is 6669977927. The reversal of 6669977893 is 3987799666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6262664769 + 407313124 = 79137^2 + 20182^2 .

It is a cyclic number.

It is not a de Polignac number, because 6669977893 - 2⁵ = 6669977861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6669977393) 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, 3334988946 + 3334988947.

It is an arithmetic number, because the mean of its divisors is an integer number (3334988947).

Almost surely, 2^6669977893 is an apocalyptic number.

It is an amenable number.

6669977893 is a deficient number, since it is larger than the sum of its proper divisors (1).

6669977893 is an equidigital number, since it uses as much as digits as its factorization.

6669977893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185177664, while the sum is 70.

The square root of 6669977893 is about 81669.9326129268. The cubic root of 6669977893 is about 1882.3836045156.

The spelling of 6669977893 in words is "six billion, six hundred sixty-nine million, nine hundred seventy-seven thousand, eight hundred ninety-three".