6530621477 has 2 divisors, whose sum is σ = 6530621478. Its totient is φ = 6530621476.

The previous prime is 6530621467. The next prime is 6530621497. The reversal of 6530621477 is 7741260356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5586964516 + 943656961 = 74746^2 + 30719^2 .

It is a cyclic number.

It is not a de Polignac number, because 6530621477 - 2⁸ = 6530621221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6530621467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3265310738 + 3265310739.

It is an arithmetic number, because the mean of its divisors is an integer number (3265310739).

Almost surely, 2^6530621477 is an apocalyptic number.

It is an amenable number.

6530621477 is a deficient number, since it is larger than the sum of its proper divisors (1).

6530621477 is an equidigital number, since it uses as much as digits as its factorization.

6530621477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 6530621477 is about 80812.2606848738. The cubic root of 6530621477 is about 1869.1816294776.

The spelling of 6530621477 in words is "six billion, five hundred thirty million, six hundred twenty-one thousand, four hundred seventy-seven".