6507897777 has 10 divisors (see below), whose sum is σ = 9721674578. Its totient is φ = 4338598464.

The previous prime is 6507897751. The next prime is 6507897833. The reversal of 6507897777 is 7777987056.

It can be written as a sum of positive squares in only one way, i.e., 6479606016 + 28291761 = 80496^2 + 5319^2 .

It is not a de Polignac number, because 6507897777 - 2¹⁰ = 6507896753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6507897577) 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 in 9 ways as a sum of consecutive naturals, for example, 40172128 + ... + 40172289.

Almost surely, 2^6507897777 is an apocalyptic number.

It is an amenable number.

6507897777 is a deficient number, since it is larger than the sum of its proper divisors (3213776801).

6507897777 is an equidigital number, since it uses as much as digits as its factorization.

6507897777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80344429 (or 80344420 counting only the distinct ones).

The product of its (nonzero) digits is 36303120, while the sum is 63.

The square root of 6507897777 is about 80671.5425475427. The cubic root of 6507897777 is about 1867.0111325007.

The spelling of 6507897777 in words is "six billion, five hundred seven million, eight hundred ninety-seven thousand, seven hundred seventy-seven".