6520063577 has 2 divisors, whose sum is σ = 6520063578. Its totient is φ = 6520063576.

The previous prime is 6520063553. The next prime is 6520063607. The reversal of 6520063577 is 7753600256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4844716816 + 1675346761 = 69604^2 + 40931^2 .

It is a cyclic number.

It is not a de Polignac number, because 6520063577 - 2²² = 6515869273 is a prime.

It is a super-2 number, since 2×6520063577² = 85022458096244069858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6520063177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260031788 + 3260031789.

It is an arithmetic number, because the mean of its divisors is an integer number (3260031789).

Almost surely, 2^6520063577 is an apocalyptic number.

It is an amenable number.

6520063577 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520063577 is an equidigital number, since it uses as much as digits as its factorization.

6520063577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 264600, while the sum is 41.

The square root of 6520063577 is about 80746.9106344014. The cubic root of 6520063577 is about 1868.1737990491.

The spelling of 6520063577 in words is "six billion, five hundred twenty million, sixty-three thousand, five hundred seventy-seven".