6567881 has 2 divisors, whose sum is σ = 6567882. Its totient is φ = 6567880.

The previous prime is 6567871. The next prime is 6567887. The reversal of 6567881 is 1887656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6451600 + 116281 = 2540^2 + 341^2 .

It is a cyclic number.

It is not a de Polignac number, because 6567881 - 2⁶ = 6567817 is a prime.

It is a super-2 number, since 2×6567881² = 86274121660322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6567887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3283940 + 3283941.

It is an arithmetic number, because the mean of its divisors is an integer number (3283941).

Almost surely, 2^6567881 is an apocalyptic number.

It is an amenable number.

6567881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6567881 is an equidigital number, since it uses as much as digits as its factorization.

6567881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 6567881 is about 2562.7877399426. The cubic root of 6567881 is about 187.2729672845.

The spelling of 6567881 in words is "six million, five hundred sixty-seven thousand, eight hundred eighty-one".