6666477547 has 2 divisors, whose sum is σ = 6666477548. Its totient is φ = 6666477546.

The previous prime is 6666477487. The next prime is 6666477583. The reversal of 6666477547 is 7457746666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6666477547 - 2¹¹ = 6666475499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6666477491 and 6666477500.

It is not a weakly prime, because it can be changed into another prime (6666477247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333238773 + 3333238774.

It is an arithmetic number, because the mean of its divisors is an integer number (3333238774).

Almost surely, 2^6666477547 is an apocalyptic number.

6666477547 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666477547 is an equidigital number, since it uses as much as digits as its factorization.

6666477547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35562240, while the sum is 58.

The square root of 6666477547 is about 81648.4999678500. The cubic root of 6666477547 is about 1882.0542607518.

The spelling of 6666477547 in words is "six billion, six hundred sixty-six million, four hundred seventy-seven thousand, five hundred forty-seven".