6946780777 has 2 divisors, whose sum is σ = 6946780778. Its totient is φ = 6946780776.

The previous prime is 6946780759. The next prime is 6946780783. The reversal of 6946780777 is 7770876496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3781143081 + 3165637696 = 61491^2 + 56264^2 .

It is a cyclic number.

It is not a de Polignac number, because 6946780777 - 2¹⁹ = 6946256489 is a prime.

It is not a weakly prime, because it can be changed into another prime (6946780277) 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, 3473390388 + 3473390389.

It is an arithmetic number, because the mean of its divisors is an integer number (3473390389).

Almost surely, 2^6946780777 is an apocalyptic number.

It is an amenable number.

6946780777 is a deficient number, since it is larger than the sum of its proper divisors (1).

6946780777 is an equidigital number, since it uses as much as digits as its factorization.

6946780777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24893568, while the sum is 61.

The square root of 6946780777 is about 83347.3501498398. The cubic root of 6946780777 is about 1908.0710015851.

The spelling of 6946780777 in words is "six billion, nine hundred forty-six million, seven hundred eighty thousand, seven hundred seventy-seven".