6469688777 has 2 divisors, whose sum is σ = 6469688778. Its totient is φ = 6469688776.

The previous prime is 6469688749. The next prime is 6469688789. The reversal of 6469688777 is 7778869646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3642001801 + 2827686976 = 60349^2 + 53176^2 .

It is a cyclic number.

It is not a de Polignac number, because 6469688777 - 2⁶ = 6469688713 is a prime.

It is not a weakly prime, because it can be changed into another prime (6469688177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3234844388 + 3234844389.

It is an arithmetic number, because the mean of its divisors is an integer number (3234844389).

Almost surely, 2^6469688777 is an apocalyptic number.

It is an amenable number.

6469688777 is a deficient number, since it is larger than the sum of its proper divisors (1).

6469688777 is an equidigital number, since it uses as much as digits as its factorization.

6469688777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170698752, while the sum is 68.

The square root of 6469688777 is about 80434.3755927775. The cubic root of 6469688777 is about 1863.3501092387.

The spelling of 6469688777 in words is "six billion, four hundred sixty-nine million, six hundred eighty-eight thousand, seven hundred seventy-seven".