6561234067 has 2 divisors, whose sum is σ = 6561234068. Its totient is φ = 6561234066.

The previous prime is 6561234061. The next prime is 6561234083. The reversal of 6561234067 is 7604321656.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6561234067 is a prime.

It is a super-2 number, since 2×6561234067² = 86099584963922720978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6561234061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280617033 + 3280617034.

It is an arithmetic number, because the mean of its divisors is an integer number (3280617034).

Almost surely, 2^6561234067 is an apocalyptic number.

6561234067 is a deficient number, since it is larger than the sum of its proper divisors (1).

6561234067 is an equidigital number, since it uses as much as digits as its factorization.

6561234067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 6561234067 is about 81001.4448451384. Note that the first 3 decimals coincide. The cubic root of 6561234067 is about 1872.0977028953.

The spelling of 6561234067 in words is "six billion, five hundred sixty-one million, two hundred thirty-four thousand, sixty-seven".